157637394431 has 16 divisors (see below), whose sum is σ = 177944532480. Its totient is φ = 138401229120.

The previous prime is 157637394391. The next prime is 157637394469. The reversal of 157637394431 is 134493736751.

It is a happy number.

It is not a de Polignac number, because 157637394431 - 2⁶ = 157637394367 is a prime.

It is a super-2 number, since 2×157637394431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157637396431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1830215 + ... + 1914408.

It is an arithmetic number, because the mean of its divisors is an integer number (11121533280).

Almost surely, 2^157637394431 is an apocalyptic number.

157637394431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157637394431 is a deficient number, since it is larger than the sum of its proper divisors (20307138049).

157637394431 is a wasteful number, since it uses less digits than its factorization.

157637394431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744766.

The product of its digits is 5715360, while the sum is 53.

The spelling of 157637394431 in words is "one hundred fifty-seven billion, six hundred thirty-seven million, three hundred ninety-four thousand, four hundred thirty-one".