1640100464 has 20 divisors (see below), whose sum is σ = 3188932056. Its totient is φ = 817150272.

The previous prime is 1640100457. The next prime is 1640100493. The reversal of 1640100464 is 4640010461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176579 + ... + 185634.

Almost surely, 2^1640100464 is an apocalyptic number.

It is an amenable number.

1640100464 is a deficient number, since it is larger than the sum of its proper divisors (1548831592).

1640100464 is a wasteful number, since it uses less digits than its factorization.

1640100464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362504 (or 362498 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1640100464 is about 40498.1538344651. The cubic root of 1640100464 is about 1179.2977876962.

The spelling of 1640100464 in words is "one billion, six hundred forty million, one hundred thousand, four hundred sixty-four".