1381397962851 has 16 divisors (see below), whose sum is σ = 2052216115200. Its totient is φ = 918366698664.

The previous prime is 1381397962801. The next prime is 1381397962859. The reversal of 1381397962851 is 1582697931831.

1381397962851 is a `hidden beast` number, since 1 + 3 + 81 + 397 + 96 + 2 + 85 + 1 = 666.

It is not a de Polignac number, because 1381397962851 - 2⁷ = 1381397962723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1381397962859) 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, 71247811 + ... + 71267196.

It is an arithmetic number, because the mean of its divisors is an integer number (128263507200).

Almost surely, 2^{1381397962851} is an apocalyptic number.

1381397962851 is a deficient number, since it is larger than the sum of its proper divisors (670818152349).

1381397962851 is a wasteful number, since it uses less digits than its factorization.

1381397962851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142515375 (or 142515369 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 63.

The spelling of 1381397962851 in words is "one trillion, three hundred eighty-one billion, three hundred ninety-seven million, nine hundred sixty-two thousand, eight hundred fifty-one".