7156990800 has 180 divisors, whose sum is σ = 25365787200. Its totient is φ = 1867879680.

The previous prime is 7156990781. The next prime is 7156990807. The reversal of 7156990800 is 80996517.

7156990800 is a `hidden beast` number, since 7 + 1 + 569 + 9 + 0 + 80 + 0 = 666.

It is a Cunningham number, because it is equal to 84599²-1.

It is a tau number, because it is divible by the number of its divisors (180).

It is a super-2 number, since 2×7156990800² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7156990807) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 148051 + ... + 190349.

It is an arithmetic number, because the mean of its divisors is an integer number (140921040).

Almost surely, 2^7156990800 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7156990800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12682893600).

7156990800 is an abundant number, since it is smaller than the sum of its proper divisors (18208796400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7156990800 is a wasteful number, since it uses less digits than its factorization.

7156990800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42370 (or 42356 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 7156990800 is about 84598.9999940898. Note that the first 5 decimals coincide. The cubic root of 7156990800 is about 1927.1261873058.

The spelling of 7156990800 in words is "seven billion, one hundred fifty-six million, nine hundred ninety thousand, eight hundred".