13851691029796 has 9 divisors (see below), whose sum is σ = 24240472328401. Its totient is φ = 6925841793112.

The previous prime is 13851691029793. The next prime is 13851691029809. The reversal of 13851691029796 is 69792019615831.

It is a happy number.

The square root of 13851691029796 is 3721786.

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

It can be written as a sum of positive squares in only one way, i.e., 6043779728100 + 7807911301696 = 2458410^2 + 2794264^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13851691029793) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6513126 + ... + 8374018.

Almost surely, 2^{13851691029796} is an apocalyptic number.

13851691029796 is the 3721786-th square number.

It is an amenable number.

13851691029796 is a deficient number, since it is larger than the sum of its proper divisors (10388781298605).

13851691029796 is an frugal number, since it uses more digits than its factorization.

13851691029796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3721790 (or 1860895 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 67.

The spelling of 13851691029796 in words is "thirteen trillion, eight hundred fifty-one billion, six hundred ninety-one million, twenty-nine thousand, seven hundred ninety-six".