23557781371 has 2 divisors, whose sum is σ = 23557781372. Its totient is φ = 23557781370.

The previous prime is 23557781363. The next prime is 23557781393. The reversal of 23557781371 is 17318775532.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23557781371 - 2³ = 23557781363 is a prime.

It is not a weakly prime, because it can be changed into another prime (23557787371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11778890685 + 11778890686.

It is an arithmetic number, because the mean of its divisors is an integer number (11778890686).

Almost surely, 2^23557781371 is an apocalyptic number.

23557781371 is a deficient number, since it is larger than the sum of its proper divisors (1).

23557781371 is an equidigital number, since it uses as much as digits as its factorization.

23557781371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1234800, while the sum is 49.

The spelling of 23557781371 in words is "twenty-three billion, five hundred fifty-seven million, seven hundred eighty-one thousand, three hundred seventy-one".