15256361651651 has 4 divisors (see below), whose sum is σ = 15413643730632. Its totient is φ = 15099079572672.

The previous prime is 15256361651639. The next prime is 15256361651669. The reversal of 15256361651651 is 15615616365251.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15256361651651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15256361651593 and 15256361651602.

It is not an unprimeable number, because it can be changed into a prime (15256361651621) 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, 78641039345 + ... + 78641039538.

It is an arithmetic number, because the mean of its divisors is an integer number (3853410932658).

Almost surely, 2^{15256361651651} is an apocalyptic number.

15256361651651 is a deficient number, since it is larger than the sum of its proper divisors (157282078981).

15256361651651 is an equidigital number, since it uses as much as digits as its factorization.

15256361651651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157282078980.

The product of its digits is 4860000, while the sum is 53.

The spelling of 15256361651651 in words is "fifteen trillion, two hundred fifty-six billion, three hundred sixty-one million, six hundred fifty-one thousand, six hundred fifty-one".