23508271649 has 2 divisors, whose sum is σ = 23508271650. Its totient is φ = 23508271648.

The previous prime is 23508271643. The next prime is 23508271667. The reversal of 23508271649 is 94617280532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19302100624 + 4206171025 = 138932^2 + 64855^2 .

It is a cyclic number.

It is not a de Polignac number, because 23508271649 - 2³² = 19213304353 is a prime.

It is not a weakly prime, because it can be changed into another prime (23508271643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11754135824 + 11754135825.

It is an arithmetic number, because the mean of its divisors is an integer number (11754135825).

It is a 2-persistent number, because it is pandigital, and so is 2⋅23508271649 = 47016543298, but 3⋅23508271649 = 70524814947 is not.

Almost surely, 2^23508271649 is an apocalyptic number.

It is an amenable number.

23508271649 is a deficient number, since it is larger than the sum of its proper divisors (1).

23508271649 is an equidigital number, since it uses as much as digits as its factorization.

23508271649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 23508271649 in words is "twenty-three billion, five hundred eight million, two hundred seventy-one thousand, six hundred forty-nine".