1642955864 has 32 divisors (see below), whose sum is σ = 3362634000. Its totient is φ = 746344320.

The previous prime is 1642955819. The next prime is 1642955917. The reversal of 1642955864 is 4685592461.

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, 171062 + ... + 180410.

Almost surely, 2^1642955864 is an apocalyptic number.

It is an amenable number.

1642955864 is an abundant number, since it is smaller than the sum of its proper divisors (1719678136).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1642955864 is a wasteful number, since it uses less digits than its factorization.

1642955864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11363 (or 11359 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 50.

The square root of 1642955864 is about 40533.3919626769. The cubic root of 1642955864 is about 1179.9817731552.

The spelling of 1642955864 in words is "one billion, six hundred forty-two million, nine hundred fifty-five thousand, eight hundred sixty-four".