1640906992 has 10 divisors (see below), whose sum is σ = 3179257328. Its totient is φ = 820453488.

The previous prime is 1640906987. The next prime is 1640907007. The reversal of 1640906992 is 2996090461.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 51278328 + ... + 51278359.

Almost surely, 2^1640906992 is an apocalyptic number.

It is an amenable number.

1640906992 is a deficient number, since it is larger than the sum of its proper divisors (1538350336).

1640906992 is a wasteful number, since it uses less digits than its factorization.

1640906992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102556695 (or 102556689 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 1640906992 is about 40508.1102003043. The cubic root of 1640906992 is about 1179.4910646409.

The spelling of 1640906992 in words is "one billion, six hundred forty million, nine hundred six thousand, nine hundred ninety-two".