1381431161924 has 12 divisors (see below), whose sum is σ = 2637277672848. Its totient is φ = 627923255400.

The previous prime is 1381431161923. The next prime is 1381431161939. The reversal of 1381431161924 is 4291611341831.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 31396162771 = 1381431161924 / (1 + 3 + 8 + 1 + 4 + 3 + 1 + 1 + 6 + 1 + 9 + 2 + 4).

It is not an unprimeable number, because it can be changed into a prime (1381431161923) 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, 15698081342 + ... + 15698081429.

It is an arithmetic number, because the mean of its divisors is an integer number (219773139404).

Almost surely, 2^{1381431161924} is an apocalyptic number.

It is an amenable number.

1381431161924 is a deficient number, since it is larger than the sum of its proper divisors (1255846510924).

1381431161924 is a wasteful number, since it uses less digits than its factorization.

1381431161924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31396162786 (or 31396162784 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The spelling of 1381431161924 in words is "one trillion, three hundred eighty-one billion, four hundred thirty-one million, one hundred sixty-one thousand, nine hundred twenty-four".