1640317375 has 8 divisors (see below), whose sum is σ = 2047116240. Its totient is φ = 1312253800.

The previous prime is 1640317363. The next prime is 1640317391. The reversal of 1640317375 is 5737130461.

It is not a de Polignac number, because 1640317375 - 2⁷ = 1640317247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6561145 + ... + 6561394.

It is an arithmetic number, because the mean of its divisors is an integer number (255889530).

Almost surely, 2^1640317375 is an apocalyptic number.

1640317375 is a deficient number, since it is larger than the sum of its proper divisors (406798865).

1640317375 is an equidigital number, since it uses as much as digits as its factorization.

1640317375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13122554 (or 13122544 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 1640317375 is about 40500.8317815820. The cubic root of 1640317375 is about 1179.3497746308.

The spelling of 1640317375 in words is "one billion, six hundred forty million, three hundred seventeen thousand, three hundred seventy-five".