23453591639 has 2 divisors, whose sum is σ = 23453591640. Its totient is φ = 23453591638.

The previous prime is 23453591633. The next prime is 23453591719. The reversal of 23453591639 is 93619535432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23453591639 - 2³² = 19158624343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23453591633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11726795819 + 11726795820.

It is an arithmetic number, because the mean of its divisors is an integer number (11726795820).

Almost surely, 2^23453591639 is an apocalyptic number.

23453591639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23453591639 is an equidigital number, since it uses as much as digits as its factorization.

23453591639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2624400, while the sum is 50.

The spelling of 23453591639 in words is "twenty-three billion, four hundred fifty-three million, five hundred ninety-one thousand, six hundred thirty-nine".