6938122157 has 4 divisors (see below), whose sum is σ = 6946162560. Its totient is φ = 6930081756.

The previous prime is 6938122151. The next prime is 6938122159. The reversal of 6938122157 is 7512218396.

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 6938122157 - 2⁸ = 6938121901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6938122151) 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, 4018907 + ... + 4020632.

It is an arithmetic number, because the mean of its divisors is an integer number (1736540640).

Almost surely, 2^6938122157 is an apocalyptic number.

It is an amenable number.

6938122157 is a deficient number, since it is larger than the sum of its proper divisors (8040403).

6938122157 is an equidigital number, since it uses as much as digits as its factorization.

6938122157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8040402.

The product of its digits is 181440, while the sum is 44.

The square root of 6938122157 is about 83295.3909709295. The cubic root of 6938122157 is about 1907.2779181326.

The spelling of 6938122157 in words is "six billion, nine hundred thirty-eight million, one hundred twenty-two thousand, one hundred fifty-seven".