15481123577 has 2 divisors, whose sum is σ = 15481123578. Its totient is φ = 15481123576.

The previous prime is 15481123561. The next prime is 15481123589. The reversal of 15481123577 is 77532118451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11418845881 + 4062277696 = 106859^2 + 63736^2 .

It is a cyclic number.

It is not a de Polignac number, because 15481123577 - 2⁴ = 15481123561 is a prime.

It is not a weakly prime, because it can be changed into another prime (15481128577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7740561788 + 7740561789.

It is an arithmetic number, because the mean of its divisors is an integer number (7740561789).

Almost surely, 2^15481123577 is an apocalyptic number.

It is an amenable number.

15481123577 is a deficient number, since it is larger than the sum of its proper divisors (1).

15481123577 is an equidigital number, since it uses as much as digits as its factorization.

15481123577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 44.

The spelling of 15481123577 in words is "fifteen billion, four hundred eighty-one million, one hundred twenty-three thousand, five hundred seventy-seven".