40640860876640 has 24 divisors (see below), whose sum is σ = 96014033821440. Its totient is φ = 16256344350592.

The previous prime is 40640860876639. The next prime is 40640860876687. The reversal of 40640860876640 is 4667806804604.

It is a self number, because there is not a number n which added to its sum of digits gives 40640860876640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127002690080 + ... + 127002690399.

It is an arithmetic number, because the mean of its divisors is an integer number (4000584742560).

Almost surely, 2^{40640860876640} is an apocalyptic number.

40640860876640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40640860876640 is an abundant number, since it is smaller than the sum of its proper divisors (55373172944800).

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

40640860876640 is a wasteful number, since it uses less digits than its factorization.

40640860876640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254005380494 (or 254005380486 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 59.

The spelling of 40640860876640 in words is "forty trillion, six hundred forty billion, eight hundred sixty million, eight hundred seventy-six thousand, six hundred forty".