23661240892559 has 2 divisors, whose sum is σ = 23661240892560. Its totient is φ = 23661240892558.

The previous prime is 23661240892547. The next prime is 23661240892577. The reversal of 23661240892559 is 95529804216632.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23661240892559 - 2⁴ = 23661240892543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23661240895559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11830620446279 + 11830620446280.

It is an arithmetic number, because the mean of its divisors is an integer number (11830620446280).

Almost surely, 2^{23661240892559} is an apocalyptic number.

23661240892559 is a deficient number, since it is larger than the sum of its proper divisors (1).

23661240892559 is an equidigital number, since it uses as much as digits as its factorization.

23661240892559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55987200, while the sum is 62.

The spelling of 23661240892559 in words is "twenty-three trillion, six hundred sixty-one billion, two hundred forty million, eight hundred ninety-two thousand, five hundred fifty-nine".