7138400656816 has 40 divisors (see below), whose sum is σ = 16248597304464. Its totient is φ = 2995133141760.

The previous prime is 7138400656801. The next prime is 7138400656841. The reversal of 7138400656816 is 6186560048317.

It is a super-2 number, since 2×7138400656816² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

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, 1559962891 + ... + 1559967466.

Almost surely, 2^{7138400656816} is an apocalyptic number.

It is an amenable number.

7138400656816 is an abundant number, since it is smaller than the sum of its proper divisors (9110196647648).

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

7138400656816 is a wasteful number, since it uses less digits than its factorization.

7138400656816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119930389 (or 3119930383 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 7138400656816 in words is "seven trillion, one hundred thirty-eight billion, four hundred million, six hundred fifty-six thousand, eight hundred sixteen".