7918136380 has 288 divisors, whose sum is σ = 22582506240. Its totient is φ = 2299207680.

The previous prime is 7918136363. The next prime is 7918136407. The reversal of 7918136380 is 836318197.

It is a self number, because there is not a number n which added to its sum of digits gives 7918136380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 13722652 + ... + 13723228.

It is an arithmetic number, because the mean of its divisors is an integer number (78411480).

Almost surely, 2^7918136380 is an apocalyptic number.

7918136380 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7918136380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11291253120).

7918136380 is an abundant number, since it is smaller than the sum of its proper divisors (14664369860).

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

7918136380 is a wasteful number, since it uses less digits than its factorization.

7918136380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 7918136380 is about 88983.9107929068. The cubic root of 7918136380 is about 1993.1546288442.

The spelling of 7918136380 in words is "seven billion, nine hundred eighteen million, one hundred thirty-six thousand, three hundred eighty".