638011476480 has 160 divisors (see below), whose sum is σ = 2331020697984. Its totient is φ = 145831182336.

The previous prime is 638011476367. The next prime is 638011476521. The reversal of 638011476480 is 84674110836.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 15 ways as a sum of consecutive naturals, for example, 5880127 + ... + 5987646.

Almost surely, 2^638011476480 is an apocalyptic number.

638011476480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

638011476480 is an abundant number, since it is smaller than the sum of its proper divisors (1693009221504).

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

638011476480 is a wasteful number, since it uses less digits than its factorization.

638011476480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11867806 (or 11867790 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 48.

The spelling of 638011476480 in words is "six hundred thirty-eight billion, eleven million, four hundred seventy-six thousand, four hundred eighty".