7912814640 has 40 divisors (see below), whose sum is σ = 24529726128. Its totient is φ = 2110083840.

The previous prime is 7912814597. The next prime is 7912814671. The reversal of 7912814640 is 464182197.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×7912814640² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7912814592 and 7912814601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16484791 + ... + 16485270.

Almost surely, 2^7912814640 is an apocalyptic number.

It is an amenable number.

7912814640 is an abundant number, since it is smaller than the sum of its proper divisors (16616911488).

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

7912814640 is a wasteful number, since it uses less digits than its factorization.

7912814640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32970077 (or 32970071 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 7912814640 is about 88954.0029453425. The cubic root of 7912814640 is about 1992.7079990057.

The spelling of 7912814640 in words is "seven billion, nine hundred twelve million, eight hundred fourteen thousand, six hundred forty".