40651316864 has 16 divisors (see below), whose sum is σ = 80985045570. Its totient is φ = 20325658368.

The previous prime is 40651316851. The next prime is 40651316873. The reversal of 40651316864 is 46861315604.

It can be written as a sum of positive squares in only one way, i.e., 36756558400 + 3894758464 = 191720^2 + 62408^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158794079 + ... + 158794334.

Almost surely, 2^40651316864 is an apocalyptic number.

It is an amenable number.

40651316864 is a deficient number, since it is larger than the sum of its proper divisors (40333728706).

40651316864 is an equidigital number, since it uses as much as digits as its factorization.

40651316864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317588427 (or 317588415 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 44.

The spelling of 40651316864 in words is "forty billion, six hundred fifty-one million, three hundred sixteen thousand, eight hundred sixty-four".