15271994504491 has 2 divisors, whose sum is σ = 15271994504492. Its totient is φ = 15271994504490.

The previous prime is 15271994504461. The next prime is 15271994504509. The reversal of 15271994504491 is 19440549917251.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15271994504491 - 2³⁷ = 15134555551019 is a prime.

It is a super-2 number, since 2×15271994504491² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (15271994504411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7635997252245 + 7635997252246.

It is an arithmetic number, because the mean of its divisors is an integer number (7635997252246).

Almost surely, 2^{15271994504491} is an apocalyptic number.

15271994504491 is a deficient number, since it is larger than the sum of its proper divisors (1).

15271994504491 is an equidigital number, since it uses as much as digits as its factorization.

15271994504491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16329600, while the sum is 61.

The spelling of 15271994504491 in words is "fifteen trillion, two hundred seventy-one billion, nine hundred ninety-four million, five hundred four thousand, four hundred ninety-one".