40540639684 has 24 divisors (see below), whose sum is σ = 74080702080. Its totient is φ = 19375914624.

The previous prime is 40540639651. The next prime is 40540639723. The reversal of 40540639684 is 48693604504.

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, 10984 + ... + 284959.

It is an arithmetic number, because the mean of its divisors is an integer number (3086695920).

Almost surely, 2^40540639684 is an apocalyptic number.

It is an amenable number.

40540639684 is a deficient number, since it is larger than the sum of its proper divisors (33540062396).

40540639684 is a wasteful number, since it uses less digits than its factorization.

40540639684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297459 (or 297457 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 40540639684 in words is "forty billion, five hundred forty million, six hundred thirty-nine thousand, six hundred eighty-four".