15115661051 has 2 divisors, whose sum is σ = 15115661052. Its totient is φ = 15115661050.

The previous prime is 15115661047. The next prime is 15115661053. The reversal of 15115661051 is 15016651151.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15115661051 - 2² = 15115661047 is a prime.

Together with 15115661053, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 15115660999 and 15115661017.

It is not a weakly prime, because it can be changed into another prime (15115661053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7557830525 + 7557830526.

It is an arithmetic number, because the mean of its divisors is an integer number (7557830526).

Almost surely, 2^15115661051 is an apocalyptic number.

15115661051 is a deficient number, since it is larger than the sum of its proper divisors (1).

15115661051 is an equidigital number, since it uses as much as digits as its factorization.

15115661051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 15115661051 in words is "fifteen billion, one hundred fifteen million, six hundred sixty-one thousand, fifty-one".