23457780257 has 4 divisors (see below), whose sum is σ = 24091774356. Its totient is φ = 22823786160.

The previous prime is 23457780223. The next prime is 23457780301. The reversal of 23457780257 is 75208775432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17851364881 + 5606415376 = 133609^2 + 74876^2 .

It is a cyclic number.

It is not a de Polignac number, because 23457780257 - 2²⁴ = 23441003041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23457780557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316996994 + ... + 316997067.

It is an arithmetic number, because the mean of its divisors is an integer number (6022943589).

Almost surely, 2^23457780257 is an apocalyptic number.

It is an amenable number.

23457780257 is a deficient number, since it is larger than the sum of its proper divisors (633994099).

23457780257 is an equidigital number, since it uses as much as digits as its factorization.

23457780257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633994098.

The product of its (nonzero) digits is 3292800, while the sum is 50.

The spelling of 23457780257 in words is "twenty-three billion, four hundred fifty-seven million, seven hundred eighty thousand, two hundred fifty-seven".