23511502145 has 4 divisors (see below), whose sum is σ = 28213802580. Its totient is φ = 18809201712.

The previous prime is 23511502123. The next prime is 23511502151. The reversal of 23511502145 is 54120511532.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18751468096 + 4760034049 = 136936^2 + 68993^2 .

It is a cyclic number.

It is not a de Polignac number, because 23511502145 - 2¹⁸ = 23511240001 is a prime.

It is a super-2 number, since 2×23511502145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2351150210 + ... + 2351150219.

It is an arithmetic number, because the mean of its divisors is an integer number (7053450645).

Almost surely, 2^23511502145 is an apocalyptic number.

It is an amenable number.

23511502145 is a deficient number, since it is larger than the sum of its proper divisors (4702300435).

23511502145 is an equidigital number, since it uses as much as digits as its factorization.

23511502145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4702300434.

The product of its (nonzero) digits is 6000, while the sum is 29.

The spelling of 23511502145 in words is "twenty-three billion, five hundred eleven million, five hundred two thousand, one hundred forty-five".