38136915840 has 64 divisors (see below), whose sum is σ = 121561425360. Its totient is φ = 10169843712.

The previous prime is 38136915811. The next prime is 38136915841. The reversal of 38136915840 is 4851963183.

It is a tau number, because it is divible by the number of its divisors (64).

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

It is a self number, because there is not a number n which added to its sum of digits gives 38136915840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38136915841) by changing a digit.

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, 9929569 + ... + 9933408.

Almost surely, 2^38136915840 is an apocalyptic number.

38136915840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

38136915840 is an abundant number, since it is smaller than the sum of its proper divisors (83424509520).

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

38136915840 is a wasteful number, since it uses less digits than its factorization.

38136915840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19862999 (or 19862987 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The spelling of 38136915840 in words is "thirty-eight billion, one hundred thirty-six million, nine hundred fifteen thousand, eight hundred forty".