1373431634325 has 36 divisors (see below), whose sum is σ = 2463151338180. Its totient is φ = 731549176320.

The previous prime is 1373431634303. The next prime is 1373431634353. The reversal of 1373431634325 is 5234361343731.

It is a happy number.

1373431634325 is a `hidden beast` number, since 1 + 3 + 7 + 3 + 4 + 3 + 1 + 634 + 3 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 674333307684 + 699098326641 = 821178^2 + 836121^2 .

It is not a de Polignac number, because 1373431634325 - 2²³ = 1373423245717 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3774420 + ... + 4122269.

It is an arithmetic number, because the mean of its divisors is an integer number (68420870505).

Almost surely, 2^{1373431634325} is an apocalyptic number.

1373431634325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1373431634325 is a deficient number, since it is larger than the sum of its proper divisors (1089719703855).

1373431634325 is a wasteful number, since it uses less digits than its factorization.

1373431634325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7897478 (or 7897470 counting only the distinct ones).

The product of its digits is 1632960, while the sum is 45.

The spelling of 1373431634325 in words is "one trillion, three hundred seventy-three billion, four hundred thirty-one million, six hundred thirty-four thousand, three hundred twenty-five".