1640241136164 has 12 divisors (see below), whose sum is σ = 3827229317744. Its totient is φ = 546747045384.

The previous prime is 1640241136153. The next prime is 1640241136181. The reversal of 1640241136164 is 4616311420461.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68343380662 + ... + 68343380685.

Almost surely, 2^{1640241136164} is an apocalyptic number.

It is an amenable number.

1640241136164 is an abundant number, since it is smaller than the sum of its proper divisors (2186988181580).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640241136164 is a wasteful number, since it uses less digits than its factorization.

1640241136164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136686761354 (or 136686761352 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The spelling of 1640241136164 in words is "one trillion, six hundred forty billion, two hundred forty-one million, one hundred thirty-six thousand, one hundred sixty-four".