15496247891 has 2 divisors, whose sum is σ = 15496247892. Its totient is φ = 15496247890.

The previous prime is 15496247887. The next prime is 15496247903. The reversal of 15496247891 is 19874269451.

It is a weak prime.

It is an emirp because it is prime and its reverse (19874269451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15496247891 - 2² = 15496247887 is a prime.

It is not a weakly prime, because it can be changed into another prime (15496247831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7748123945 + 7748123946.

It is an arithmetic number, because the mean of its divisors is an integer number (7748123946).

Almost surely, 2^15496247891 is an apocalyptic number.

15496247891 is a deficient number, since it is larger than the sum of its proper divisors (1).

15496247891 is an equidigital number, since it uses as much as digits as its factorization.

15496247891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The spelling of 15496247891 in words is "fifteen billion, four hundred ninety-six million, two hundred forty-seven thousand, eight hundred ninety-one".