1613931404836 has 9 divisors (see below), whose sum is σ = 2824384404891. Its totient is φ = 806964432012.

The previous prime is 1613931404819. The next prime is 1613931404851. The reversal of 1613931404836 is 6384041393161.

The square root of 1613931404836 is 1270406.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1613931404836.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2223211 + ... + 2858413.

Almost surely, 2^{1613931404836} is an apocalyptic number.

1613931404836 is the 1270406-th square number.

It is an amenable number.

1613931404836 is a deficient number, since it is larger than the sum of its proper divisors (1210453000055).

1613931404836 is an frugal number, since it uses more digits than its factorization.

1613931404836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270410 (or 635205 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

Multiplying 1613931404836 by its sum of digits (49), we get a square (79082638836964 = 8892842²).

Adding to 1613931404836 its reverse (6384041393161), we get a palindrome (7997972797997).

The spelling of 1613931404836 in words is "one trillion, six hundred thirteen billion, nine hundred thirty-one million, four hundred four thousand, eight hundred thirty-six".