40001664535 has 24 divisors (see below), whose sum is σ = 57898747296. Its totient is φ = 25986035520.

The previous prime is 40001664509. The next prime is 40001664551. The reversal of 40001664535 is 53546610004.

It is not a de Polignac number, because 40001664535 - 2¹⁵ = 40001631767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40001664535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1570336 + ... + 1595605.

It is an arithmetic number, because the mean of its divisors is an integer number (2412447804).

Almost surely, 2^40001664535 is an apocalyptic number.

40001664535 is a deficient number, since it is larger than the sum of its proper divisors (17897082761).

40001664535 is a wasteful number, since it uses less digits than its factorization.

40001664535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3165991 (or 3165972 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The spelling of 40001664535 in words is "forty billion, one million, six hundred sixty-four thousand, five hundred thirty-five".