23987964551 has 2 divisors, whose sum is σ = 23987964552. Its totient is φ = 23987964550.

The previous prime is 23987964541. The next prime is 23987964557. The reversal of 23987964551 is 15546978932.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23987964551 - 2⁶ = 23987964487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23987964557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11993982275 + 11993982276.

It is an arithmetic number, because the mean of its divisors is an integer number (11993982276).

Almost surely, 2^23987964551 is an apocalyptic number.

23987964551 is a deficient number, since it is larger than the sum of its proper divisors (1).

23987964551 is an equidigital number, since it uses as much as digits as its factorization.

23987964551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16329600, while the sum is 59.

The spelling of 23987964551 in words is "twenty-three billion, nine hundred eighty-seven million, nine hundred sixty-four thousand, five hundred fifty-one".