15398845961 has 2 divisors, whose sum is σ = 15398845962. Its totient is φ = 15398845960.

The previous prime is 15398845937. The next prime is 15398846027. The reversal of 15398845961 is 16954889351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11179044361 + 4219801600 = 105731^2 + 64960^2 .

It is a cyclic number.

It is not a de Polignac number, because 15398845961 - 2²⁶ = 15331737097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15398845961.

It is not a weakly prime, because it can be changed into another prime (15398845901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7699422980 + 7699422981.

It is an arithmetic number, because the mean of its divisors is an integer number (7699422981).

Almost surely, 2^15398845961 is an apocalyptic number.

It is an amenable number.

15398845961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15398845961 is an equidigital number, since it uses as much as digits as its factorization.

15398845961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 59.

The spelling of 15398845961 in words is "fifteen billion, three hundred ninety-eight million, eight hundred forty-five thousand, nine hundred sixty-one".