13724519956 has 18 divisors (see below), whose sum is σ = 27939201738. Its totient is φ = 5881937040.

The previous prime is 13724519953. The next prime is 13724519959. The reversal of 13724519956 is 65991542731.

It is an interprime number because it is at equal distance from previous prime (13724519953) and next prime (13724519959).

It can be written as a sum of positive squares in only one way, i.e., 10132435600 + 3592084356 = 100660^2 + 59934^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13724519953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35011335 + ... + 35011726.

Almost surely, 2^13724519956 is an apocalyptic number.

It is an amenable number.

13724519956 is an abundant number, since it is smaller than the sum of its proper divisors (14214681782).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13724519956 is a wasteful number, since it uses less digits than its factorization.

13724519956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70023079 (or 70023070 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 52.

The spelling of 13724519956 in words is "thirteen billion, seven hundred twenty-four million, five hundred nineteen thousand, nine hundred fifty-six".