15197510681 has 2 divisors, whose sum is σ = 15197510682. Its totient is φ = 15197510680.

The previous prime is 15197510663. The next prime is 15197510761. The reversal of 15197510681 is 18601579151.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14468240656 + 729270025 = 120284^2 + 27005^2 .

It is a cyclic number.

It is not a de Polignac number, because 15197510681 - 2¹⁴ = 15197494297 is a prime.

It is a super-2 number, since 2×15197510681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15197515681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7598755340 + 7598755341.

It is an arithmetic number, because the mean of its divisors is an integer number (7598755341).

Almost surely, 2^15197510681 is an apocalyptic number.

It is an amenable number.

15197510681 is a deficient number, since it is larger than the sum of its proper divisors (1).

15197510681 is an equidigital number, since it uses as much as digits as its factorization.

15197510681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 44.

The spelling of 15197510681 in words is "fifteen billion, one hundred ninety-seven million, five hundred ten thousand, six hundred eighty-one".