1640925368 has 32 divisors (see below), whose sum is σ = 3137985360. Its totient is φ = 804161280.

The previous prime is 1640925347. The next prime is 1640925371. The reversal of 1640925368 is 8635290461.

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, 766796 + ... + 768932.

Almost surely, 2^1640925368 is an apocalyptic number.

It is an amenable number.

1640925368 is a deficient number, since it is larger than the sum of its proper divisors (1497059992).

1640925368 is a wasteful number, since it uses less digits than its factorization.

1640925368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4007 (or 4003 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 1640925368 is about 40508.3370184460. The cubic root of 1640925368 is about 1179.4954675406.

The spelling of 1640925368 in words is "one billion, six hundred forty million, nine hundred twenty-five thousand, three hundred sixty-eight".