15711872461 has 2 divisors, whose sum is σ = 15711872462. Its totient is φ = 15711872460.

The previous prime is 15711872459. The next prime is 15711872551. The reversal of 15711872461 is 16427811751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15698586436 + 13286025 = 125294^2 + 3645^2 .

It is a cyclic number.

It is not a de Polignac number, because 15711872461 - 2¹ = 15711872459 is a prime.

Together with 15711872459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15711872411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7855936230 + 7855936231.

It is an arithmetic number, because the mean of its divisors is an integer number (7855936231).

Almost surely, 2^15711872461 is an apocalyptic number.

It is an amenable number.

15711872461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15711872461 is an equidigital number, since it uses as much as digits as its factorization.

15711872461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 43.

The spelling of 15711872461 in words is "fifteen billion, seven hundred eleven million, eight hundred seventy-two thousand, four hundred sixty-one".