38501778765 has 16 divisors (see below), whose sum is σ = 61630437888. Its totient is φ = 20525084736.

The previous prime is 38501778751. The next prime is 38501778773. The reversal of 38501778765 is 56787710583.

38501778765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-38501778765 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540157 + ... + 607266.

It is an arithmetic number, because the mean of its divisors is an integer number (3851902368).

Almost surely, 2^38501778765 is an apocalyptic number.

It is an amenable number.

38501778765 is a deficient number, since it is larger than the sum of its proper divisors (23128659123).

38501778765 is a wasteful number, since it uses less digits than its factorization.

38501778765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149668.

The product of its (nonzero) digits is 9878400, while the sum is 57.

The spelling of 38501778765 in words is "thirty-eight billion, five hundred one million, seven hundred seventy-eight thousand, seven hundred sixty-five".