1373645031381 has 96 divisors (see below), whose sum is σ = 2381085168000. Its totient is φ = 780375907584.

The previous prime is 1373645031377. The next prime is 1373645031397. The reversal of 1373645031381 is 1831305463731.

1373645031381 is a `hidden beast` number, since 1 + 3 + 7 + 3 + 6 + 4 + 503 + 138 + 1 = 666.

It is not a de Polignac number, because 1373645031381 - 2² = 1373645031377 is a prime.

It is a super-2 number, since 2×1373645031381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1373645031481) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 166115715 + ... + 166123983.

It is an arithmetic number, because the mean of its divisors is an integer number (24802970500).

Almost surely, 2^{1373645031381} is an apocalyptic number.

It is an amenable number.

1373645031381 is a deficient number, since it is larger than the sum of its proper divisors (1007440136619).

1373645031381 is a wasteful number, since it uses less digits than its factorization.

1373645031381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9008 (or 8995 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The spelling of 1373645031381 in words is "one trillion, three hundred seventy-three billion, six hundred forty-five million, thirty-one thousand, three hundred eighty-one".