13564493051 has 2 divisors, whose sum is σ = 13564493052. Its totient is φ = 13564493050.

The previous prime is 13564492927. The next prime is 13564493057. The reversal of 13564493051 is 15039446531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13564493051 - 2²² = 13560298747 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (13564493057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6782246525 + 6782246526.

It is an arithmetic number, because the mean of its divisors is an integer number (6782246526).

Almost surely, 2^13564493051 is an apocalyptic number.

13564493051 is a deficient number, since it is larger than the sum of its proper divisors (1).

13564493051 is an equidigital number, since it uses as much as digits as its factorization.

13564493051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 194400, while the sum is 41.

The spelling of 13564493051 in words is "thirteen billion, five hundred sixty-four million, four hundred ninety-three thousand, fifty-one".