1642631874 has 16 divisors (see below), whose sum is σ = 3537976512. Its totient is φ = 505425168.

The previous prime is 1642631869. The next prime is 1642631923. The reversal of 1642631874 is 4781362461.

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 7 ways as a sum of consecutive naturals, for example, 10529614 + ... + 10529769.

It is an arithmetic number, because the mean of its divisors is an integer number (221123532).

Almost surely, 2^1642631874 is an apocalyptic number.

1642631874 is an abundant number, since it is smaller than the sum of its proper divisors (1895344638).

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

1642631874 is a wasteful number, since it uses less digits than its factorization.

1642631874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21059401.

The product of its digits is 193536, while the sum is 42.

The square root of 1642631874 is about 40529.3951842363. The cubic root of 1642631874 is about 1179.9042041355.

The spelling of 1642631874 in words is "one billion, six hundred forty-two million, six hundred thirty-one thousand, eight hundred seventy-four".