7912805550 has 288 divisors, whose sum is σ = 23663068800. Its totient is φ = 1734359040.

The previous prime is 7912805449. The next prime is 7912805557. The reversal of 7912805550 is 555082197.

It is a super-2 number, since 2×7912805550² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7912805557) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 10707081 + ... + 10707819.

Almost surely, 2^7912805550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7912805550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11831534400).

7912805550 is an abundant number, since it is smaller than the sum of its proper divisors (15750263250).

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

7912805550 is a wasteful number, since it uses less digits than its factorization.

7912805550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820 (or 798 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 42.

The square root of 7912805550 is about 88953.9518515057. The cubic root of 7912805550 is about 1992.7072359514.

The spelling of 7912805550 in words is "seven billion, nine hundred twelve million, eight hundred five thousand, five hundred fifty".