15355700778959 has 4 divisors (see below), whose sum is σ = 15399953519304. Its totient is φ = 15311448038616.

The previous prime is 15355700778949. The next prime is 15355700779019. The reversal of 15355700778959 is 95987700755351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 15355700778959 - 2¹² = 15355700774863 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15355700778892 and 15355700778901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15355700778949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22126369652 + ... + 22126370345.

It is an arithmetic number, because the mean of its divisors is an integer number (3849988379826).

Almost surely, 2^{15355700778959} is an apocalyptic number.

15355700778959 is a deficient number, since it is larger than the sum of its proper divisors (44252740345).

15355700778959 is an equidigital number, since it uses as much as digits as its factorization.

15355700778959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44252740344.

The product of its (nonzero) digits is 416745000, while the sum is 71.

The spelling of 15355700778959 in words is "fifteen trillion, three hundred fifty-five billion, seven hundred million, seven hundred seventy-eight thousand, nine hundred fifty-nine".