40420644664402 has 16 divisors (see below), whose sum is σ = 64903800535200. Its totient is φ = 18822102153120.

The previous prime is 40420644664327. The next prime is 40420644664417. The reversal of 40420644664402 is 20446644602404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9014414499 + ... + 9014418982.

It is an arithmetic number, because the mean of its divisors is an integer number (4056487533450).

Almost surely, 2^{40420644664402} is an apocalyptic number.

40420644664402 is a deficient number, since it is larger than the sum of its proper divisors (24483155870798).

40420644664402 is a wasteful number, since it uses less digits than its factorization.

40420644664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18028833561.

The product of its (nonzero) digits is 3538944, while the sum is 46.

The spelling of 40420644664402 in words is "forty trillion, four hundred twenty billion, six hundred forty-four million, six hundred sixty-four thousand, four hundred two".