157195338681 has 4 divisors (see below), whose sum is σ = 209593784912. Its totient is φ = 104796892452.

The previous prime is 157195338653. The next prime is 157195338719. The reversal of 157195338681 is 186833591751.

It is a happy number.

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 not a de Polignac number, because 157195338681 - 2⁶ = 157195338617 is a prime.

It is a super-2 number, since 2×157195338681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157195338481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26199223111 + ... + 26199223116.

It is an arithmetic number, because the mean of its divisors is an integer number (52398446228).

Almost surely, 2^157195338681 is an apocalyptic number.

It is an amenable number.

157195338681 is a deficient number, since it is larger than the sum of its proper divisors (52398446231).

157195338681 is an equidigital number, since it uses as much as digits as its factorization.

157195338681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52398446230.

The product of its digits is 5443200, while the sum is 57.

The spelling of 157195338681 in words is "one hundred fifty-seven billion, one hundred ninety-five million, three hundred thirty-eight thousand, six hundred eighty-one".