23489653491 has 24 divisors (see below), whose sum is σ = 36075723840. Its totient is φ = 14676915456.

The previous prime is 23489653409. The next prime is 23489653501. The reversal of 23489653491 is 19435698432.

23489653491 is a `hidden beast` number, since 23 + 4 + 89 + 6 + 53 + 491 = 666.

It is not a de Polignac number, because 23489653491 - 2¹⁹ = 23489129203 is a prime.

It is a super-2 number, since 2×23489653491² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23489653991) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 284620 + ... + 357753.

It is an arithmetic number, because the mean of its divisors is an integer number (1503155160).

Almost surely, 2^23489653491 is an apocalyptic number.

23489653491 is a deficient number, since it is larger than the sum of its proper divisors (12586070349).

23489653491 is a wasteful number, since it uses less digits than its factorization.

23489653491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642635 (or 642632 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 54.

The spelling of 23489653491 in words is "twenty-three billion, four hundred eighty-nine million, six hundred fifty-three thousand, four hundred ninety-one".