23778928157 has 2 divisors, whose sum is σ = 23778928158. Its totient is φ = 23778928156.

The previous prime is 23778928141. The next prime is 23778928171. The reversal of 23778928157 is 75182987732.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20542342276 + 3236585881 = 143326^2 + 56891^2 .

It is a cyclic number.

It is not a de Polignac number, because 23778928157 - 2⁴ = 23778928141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23778928096 and 23778928105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23778928357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11889464078 + 11889464079.

It is an arithmetic number, because the mean of its divisors is an integer number (11889464079).

Almost surely, 2^23778928157 is an apocalyptic number.

It is an amenable number.

23778928157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23778928157 is an equidigital number, since it uses as much as digits as its factorization.

23778928157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 59.

The spelling of 23778928157 in words is "twenty-three billion, seven hundred seventy-eight million, nine hundred twenty-eight thousand, one hundred fifty-seven".