7816775041640 has 64 divisors (see below), whose sum is σ = 17690036757120. Its totient is φ = 3108534624000.

The previous prime is 7816775041633. The next prime is 7816775041651. The reversal of 7816775041640 is 461405776187.

It is a super-2 number, since 2×7816775041640² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (56) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25120205 + ... + 25429475.

It is an arithmetic number, because the mean of its divisors is an integer number (276406824330).

Almost surely, 2^{7816775041640} is an apocalyptic number.

It is an amenable number.

7816775041640 is an abundant number, since it is smaller than the sum of its proper divisors (9873261715480).

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

7816775041640 is a wasteful number, since it uses less digits than its factorization.

7816775041640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312954 (or 312950 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 7816775041640 in words is "seven trillion, eight hundred sixteen billion, seven hundred seventy-five million, forty-one thousand, six hundred forty".