15861262441 has 2 divisors, whose sum is σ = 15861262442. Its totient is φ = 15861262440.

The previous prime is 15861262427. The next prime is 15861262511. The reversal of 15861262441 is 14426216851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14455012441 + 1406250000 = 120229^2 + 37500^2 .

It is a cyclic number.

It is not a de Polignac number, because 15861262441 - 2¹⁵ = 15861229673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15861262394 and 15861262403.

It is not a weakly prime, because it can be changed into another prime (15861212441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7930631220 + 7930631221.

It is an arithmetic number, because the mean of its divisors is an integer number (7930631221).

Almost surely, 2^15861262441 is an apocalyptic number.

It is an amenable number.

15861262441 is a deficient number, since it is larger than the sum of its proper divisors (1).

15861262441 is an equidigital number, since it uses as much as digits as its factorization.

15861262441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 40.

The spelling of 15861262441 in words is "fifteen billion, eight hundred sixty-one million, two hundred sixty-two thousand, four hundred forty-one".