23503213461561 has 16 divisors (see below), whose sum is σ = 33404522803200. Its totient is φ = 14656234374288.

The previous prime is 23503213461551. The next prime is 23503213461571. The reversal of 23503213461561 is 16516431230532.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23503213461551) and next prime (23503213461571).

It is not a de Polignac number, because 23503213461561 - 2⁵ = 23503213461529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23503213461551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2609723841 + ... + 2609732846.

It is an arithmetic number, because the mean of its divisors is an integer number (2087782675200).

Almost surely, 2^{23503213461561} is an apocalyptic number.

It is an amenable number.

23503213461561 is a deficient number, since it is larger than the sum of its proper divisors (9901309341639).

23503213461561 is a wasteful number, since it uses less digits than its factorization.

23503213461561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219456788.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 23503213461561 in words is "twenty-three trillion, five hundred three billion, two hundred thirteen million, four hundred sixty-one thousand, five hundred sixty-one".