40640167544 has 16 divisors (see below), whose sum is σ = 77056498800. Its totient is φ = 20091767872.

The previous prime is 40640167537. The next prime is 40640167609. The reversal of 40640167544 is 44576104604.

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, 28538732 + ... + 28540155.

It is an arithmetic number, because the mean of its divisors is an integer number (4816031175).

Almost surely, 2^40640167544 is an apocalyptic number.

It is an amenable number.

40640167544 is a deficient number, since it is larger than the sum of its proper divisors (36416331256).

40640167544 is a wasteful number, since it uses less digits than its factorization.

40640167544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57078982 (or 57078978 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 41.

The spelling of 40640167544 in words is "forty billion, six hundred forty million, one hundred sixty-seven thousand, five hundred forty-four".