38637117949 has 4 divisors (see below), whose sum is σ = 38679717664. Its totient is φ = 38594518236.

The previous prime is 38637117941. The next prime is 38637117989. The reversal of 38637117949 is 94971173683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38637117949 - 2³ = 38637117941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 38637117893 and 38637117902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38637117941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21298497 + ... + 21300310.

It is an arithmetic number, because the mean of its divisors is an integer number (9669929416).

Almost surely, 2^38637117949 is an apocalyptic number.

It is an amenable number.

38637117949 is a deficient number, since it is larger than the sum of its proper divisors (42599715).

38637117949 is an equidigital number, since it uses as much as digits as its factorization.

38637117949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42599714.

The product of its digits is 6858432, while the sum is 58.

The spelling of 38637117949 in words is "thirty-eight billion, six hundred thirty-seven million, one hundred seventeen thousand, nine hundred forty-nine".