15356151961 has 2 divisors, whose sum is σ = 15356151962. Its totient is φ = 15356151960.

The previous prime is 15356151919. The next prime is 15356151977. The reversal of 15356151961 is 16915165351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14424010000 + 932141961 = 120100^2 + 30531^2 .

It is a cyclic number.

It is not a de Polignac number, because 15356151961 - 2¹³ = 15356143769 is a prime.

It is a super-2 number, since 2×15356151961² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15356151911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7678075980 + 7678075981.

It is an arithmetic number, because the mean of its divisors is an integer number (7678075981).

Almost surely, 2^15356151961 is an apocalyptic number.

It is an amenable number.

15356151961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15356151961 is an equidigital number, since it uses as much as digits as its factorization.

15356151961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 121500, while the sum is 43.

The spelling of 15356151961 in words is "fifteen billion, three hundred fifty-six million, one hundred fifty-one thousand, nine hundred sixty-one".