23501157409 has 2 divisors, whose sum is σ = 23501157410. Its totient is φ = 23501157408.

The previous prime is 23501157371. The next prime is 23501157439. The reversal of 23501157409 is 90475110532.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16031358225 + 7469799184 = 126615^2 + 86428^2 .

It is a cyclic number.

It is not a de Polignac number, because 23501157409 - 2⁹ = 23501156897 is a prime.

It is not a weakly prime, because it can be changed into another prime (23501157439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11750578704 + 11750578705.

It is an arithmetic number, because the mean of its divisors is an integer number (11750578705).

Almost surely, 2^23501157409 is an apocalyptic number.

It is an amenable number.

23501157409 is a deficient number, since it is larger than the sum of its proper divisors (1).

23501157409 is an equidigital number, since it uses as much as digits as its factorization.

23501157409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37800, while the sum is 37.

The spelling of 23501157409 in words is "twenty-three billion, five hundred one million, one hundred fifty-seven thousand, four hundred nine".