38644559802 has 24 divisors (see below), whose sum is σ = 83769588084. Its totient is φ = 12875410944.

The previous prime is 38644559777. The next prime is 38644559827. The reversal of 38644559802 is 20895544683.

38644559802 is a `hidden beast` number, since 3 + 8 + 6 + 4 + 4 + 559 + 80 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (38644559777) and next prime (38644559827).

It can be written as a sum of positive squares in 2 ways, for example, as 26318897361 + 12325662441 = 162231^2 + 111021^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 469993 + ... + 546060.

Almost surely, 2^38644559802 is an apocalyptic number.

38644559802 is an abundant number, since it is smaller than the sum of its proper divisors (45125028282).

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

38644559802 is a wasteful number, since it uses less digits than its factorization.

38644559802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018174 (or 1018171 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 38644559802 in words is "thirty-eight billion, six hundred forty-four million, five hundred fifty-nine thousand, eight hundred two".