15239919065969 has 8 divisors (see below), whose sum is σ = 16413121123560. Its totient is φ = 14066845664256.

The previous prime is 15239919065957. The next prime is 15239919066017. The reversal of 15239919065969 is 96956091993251.

It can be written as a sum of positive squares in 4 ways, for example, as 2351352361744 + 12888566704225 = 1533412^2 + 3590065^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15239919065969 is a prime.

It is a super-2 number, since 2×15239919065969² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15239919065896 and 15239919065905.

It is not an unprimeable number, because it can be changed into a prime (15239919065369) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31917872 + ... + 32391825.

It is an arithmetic number, because the mean of its divisors is an integer number (2051640140445).

Almost surely, 2^{15239919065969} is an apocalyptic number.

It is an amenable number.

15239919065969 is a deficient number, since it is larger than the sum of its proper divisors (1173202057591).

15239919065969 is a wasteful number, since it uses less digits than its factorization.

15239919065969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64327939.

The product of its (nonzero) digits is 318864600, while the sum is 74.

The spelling of 15239919065969 in words is "fifteen trillion, two hundred thirty-nine billion, nine hundred nineteen million, sixty-five thousand, nine hundred sixty-nine".