23778812511 has 24 divisors (see below), whose sum is σ = 34872395376. Its totient is φ = 15611356800.

The previous prime is 23778812503. The next prime is 23778812521. The reversal of 23778812511 is 11521887732.

It is not a de Polignac number, because 23778812511 - 2³ = 23778812503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23778812501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182961 + ... + 284661.

It is an arithmetic number, because the mean of its divisors is an integer number (1453016474).

Almost surely, 2^23778812511 is an apocalyptic number.

23778812511 is a deficient number, since it is larger than the sum of its proper divisors (11093582865).

23778812511 is a wasteful number, since it uses less digits than its factorization.

23778812511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102103 (or 102100 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The spelling of 23778812511 in words is "twenty-three billion, seven hundred seventy-eight million, eight hundred twelve thousand, five hundred eleven".