38698779644 has 24 divisors (see below), whose sum is σ = 81471116160. Its totient is φ = 15712286256.

The previous prime is 38698779641. The next prime is 38698779649. The reversal of 38698779644 is 44697789683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38698779641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36370502 + ... + 36371565.

It is an arithmetic number, because the mean of its divisors is an integer number (3394629840).

Almost surely, 2^38698779644 is an apocalyptic number.

It is an amenable number.

38698779644 is an abundant number, since it is smaller than the sum of its proper divisors (42772336516).

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

38698779644 is a wasteful number, since it uses less digits than its factorization.

38698779644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72742097 (or 72742095 counting only the distinct ones).

The product of its digits is 438939648, while the sum is 71.

The spelling of 38698779644 in words is "thirty-eight billion, six hundred ninety-eight million, seven hundred seventy-nine thousand, six hundred forty-four".