1640290504 has 16 divisors (see below), whose sum is σ = 3093325020. Its totient is φ = 815403840.

The previous prime is 1640290499. The next prime is 1640290523. The reversal of 1640290504 is 4050920461.

It can be written as a sum of positive squares in 2 ways, for example, as 1640088004 + 202500 = 40498^2 + 450^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591207 + ... + 593974.

Almost surely, 2^1640290504 is an apocalyptic number.

It is an amenable number.

1640290504 is a deficient number, since it is larger than the sum of its proper divisors (1453034516).

1640290504 is a wasteful number, since it uses less digits than its factorization.

1640290504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1185360 (or 1185356 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1640290504 is about 40500.5000462957. The cubic root of 1640290504 is about 1179.3433347224.

The spelling of 1640290504 in words is "one billion, six hundred forty million, two hundred ninety thousand, five hundred four".