638190052948 has 12 divisors (see below), whose sum is σ = 1276380105952. Its totient is φ = 273510022680.

The previous prime is 638190052937. The next prime is 638190052987. The reversal of 638190052948 is 849250091836.

638190052948 is an admirable number.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11396250918 + ... + 11396250973.

Almost surely, 2^638190052948 is an apocalyptic number.

It is an amenable number.

638190052948 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

638190052948 is a wasteful number, since it uses less digits than its factorization.

638190052948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22792501902 (or 22792501900 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 55.

The spelling of 638190052948 in words is "six hundred thirty-eight billion, one hundred ninety million, fifty-two thousand, nine hundred forty-eight".