15191614481 has 2 divisors, whose sum is σ = 15191614482. Its totient is φ = 15191614480.

The previous prime is 15191614457. The next prime is 15191614499. The reversal of 15191614481 is 18441619151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14516394256 + 675220225 = 120484^2 + 25985^2 .

It is a cyclic number.

It is not a de Polignac number, because 15191614481 - 2²² = 15187420177 is a prime.

It is a super-2 number, since 2×15191614481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15191674481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7595807240 + 7595807241.

It is an arithmetic number, because the mean of its divisors is an integer number (7595807241).

Almost surely, 2^15191614481 is an apocalyptic number.

It is an amenable number.

15191614481 is a deficient number, since it is larger than the sum of its proper divisors (1).

15191614481 is an equidigital number, since it uses as much as digits as its factorization.

15191614481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 41.

The spelling of 15191614481 in words is "fifteen billion, one hundred ninety-one million, six hundred fourteen thousand, four hundred eighty-one".