15161776728451 has 2 divisors, whose sum is σ = 15161776728452. Its totient is φ = 15161776728450.

The previous prime is 15161776728437. The next prime is 15161776728613. The reversal of 15161776728451 is 15482767716151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15161776728451 - 2²¹ = 15161774631299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15161776728451.

It is not a weakly prime, because it can be changed into another prime (15161776728401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7580888364225 + 7580888364226.

It is an arithmetic number, because the mean of its divisors is an integer number (7580888364226).

Almost surely, 2^{15161776728451} is an apocalyptic number.

15161776728451 is a deficient number, since it is larger than the sum of its proper divisors (1).

15161776728451 is an equidigital number, since it uses as much as digits as its factorization.

15161776728451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19756800, while the sum is 61.

The spelling of 15161776728451 in words is "fifteen trillion, one hundred sixty-one billion, seven hundred seventy-six million, seven hundred twenty-eight thousand, four hundred fifty-one".