7912831680 has 560 divisors, whose sum is σ = 31661429184. Its totient is φ = 1861263360.

The previous prime is 7912831673. The next prime is 7912831681. The reversal of 7912831680 is 861382197.

It is a super-2 number, since 2×7912831680² (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 not an unprimeable number, because it can be changed into a prime (7912831681) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 7749570 + ... + 7750590.

Almost surely, 2^7912831680 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 7912831680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15830714592).

7912831680 is an abundant number, since it is smaller than the sum of its proper divisors (23748597504).

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

7912831680 is a wasteful number, since it uses less digits than its factorization.

7912831680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086 (or 1067 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 7912831680 is about 88954.0987251290. The cubic root of 7912831680 is about 1992.7094294162.

The spelling of 7912831680 in words is "seven billion, nine hundred twelve million, eight hundred thirty-one thousand, six hundred eighty".