1638012802 has 16 divisors (see below), whose sum is σ = 2489512032. Its totient is φ = 808198560.

The previous prime is 1638012797. The next prime is 1638012841. The reversal of 1638012802 is 2082108361.

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, 150277 + ... + 160807.

It is an arithmetic number, because the mean of its divisors is an integer number (155594502).

Almost surely, 2^1638012802 is an apocalyptic number.

1638012802 is a deficient number, since it is larger than the sum of its proper divisors (851499230).

1638012802 is a wasteful number, since it uses less digits than its factorization.

1638012802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11553.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1638012802 is about 40472.3708472830. The cubic root of 1638012802 is about 1178.7972044339.

The spelling of 1638012802 in words is "one billion, six hundred thirty-eight million, twelve thousand, eight hundred two".