15115461161 has 2 divisors, whose sum is σ = 15115461162. Its totient is φ = 15115461160.

The previous prime is 15115461157. The next prime is 15115461167. The reversal of 15115461161 is 16116451151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14986411561 + 129049600 = 122419^2 + 11360^2 .

It is a cyclic number.

It is not a de Polignac number, because 15115461161 - 2² = 15115461157 is a prime.

It is a super-2 number, since 2×15115461161² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15115461167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7557730580 + 7557730581.

It is an arithmetic number, because the mean of its divisors is an integer number (7557730581).

Almost surely, 2^15115461161 is an apocalyptic number.

It is an amenable number.

15115461161 is a deficient number, since it is larger than the sum of its proper divisors (1).

15115461161 is an equidigital number, since it uses as much as digits as its factorization.

15115461161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 32.

The spelling of 15115461161 in words is "fifteen billion, one hundred fifteen million, four hundred sixty-one thousand, one hundred sixty-one".