1377531231157 has 16 divisors (see below), whose sum is σ = 1414903207680. Its totient is φ = 1340514459648.

The previous prime is 1377531231149. The next prime is 1377531231179. The reversal of 1377531231157 is 7511321357731.

It is a cyclic number.

It is not a de Polignac number, because 1377531231157 - 2³ = 1377531231149 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 (1377531231187) 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, 6502969 + ... + 6711457.

It is an arithmetic number, because the mean of its divisors is an integer number (88431450480).

Almost surely, 2^{1377531231157} is an apocalyptic number.

It is an amenable number.

1377531231157 is a deficient number, since it is larger than the sum of its proper divisors (37371976523).

1377531231157 is a wasteful number, since it uses less digits than its factorization.

1377531231157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209340.

The product of its digits is 463050, while the sum is 46.

Adding to 1377531231157 its reverse (7511321357731), we get a palindrome (8888852588888).

The spelling of 1377531231157 in words is "one trillion, three hundred seventy-seven billion, five hundred thirty-one million, two hundred thirty-one thousand, one hundred fifty-seven".