40615664 has 10 divisors (see below), whose sum is σ = 78692880. Its totient is φ = 20307824.

The previous prime is 40615651. The next prime is 40615697. The reversal of 40615664 is 46651604.

It is a self number, because there is not a number n which added to its sum of digits gives 40615664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269224 + ... + 1269255.

It is an arithmetic number, because the mean of its divisors is an integer number (7869288).

Almost surely, 2^40615664 is an apocalyptic number.

It is an amenable number.

40615664 is a deficient number, since it is larger than the sum of its proper divisors (38077216).

40615664 is a wasteful number, since it uses less digits than its factorization.

40615664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538487 (or 2538481 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 40615664 is about 6373.0419738144. The cubic root of 40615664 is about 343.7408811245.

The spelling of 40615664 in words is "forty million, six hundred fifteen thousand, six hundred sixty-four".