1640640625954 has 8 divisors (see below), whose sum is σ = 2684684660688. Its totient is φ = 745745739060.

The previous prime is 1640640625903. The next prime is 1640640626033. The reversal of 1640640625954 is 4595260460461.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 37287286932 + ... + 37287286975.

It is an arithmetic number, because the mean of its divisors is an integer number (335585582586).

Almost surely, 2^{1640640625954} is an apocalyptic number.

1640640625954 is a deficient number, since it is larger than the sum of its proper divisors (1044044034734).

1640640625954 is a wasteful number, since it uses less digits than its factorization.

1640640625954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74574573920.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 1640640625954 in words is "one trillion, six hundred forty billion, six hundred forty million, six hundred twenty-five thousand, nine hundred fifty-four".