23405012352661 has 4 divisors (see below), whose sum is σ = 23975866312524. Its totient is φ = 22834158392800.

The previous prime is 23405012352541. The next prime is 23405012352703. The reversal of 23405012352661 is 16625321050432.

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 752219697636 + 22652792655025 = 867306^2 + 4759495^2 .

It is a cyclic number.

It is not a de Polignac number, because 23405012352661 - 2³⁹ = 22855256538773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23405012355661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285426979870 + ... + 285426979951.

It is an arithmetic number, because the mean of its divisors is an integer number (5993966578131).

Almost surely, 2^{23405012352661} is an apocalyptic number.

It is an amenable number.

23405012352661 is a deficient number, since it is larger than the sum of its proper divisors (570853959863).

23405012352661 is an equidigital number, since it uses as much as digits as its factorization.

23405012352661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570853959862.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 23405012352661 in words is "twenty-three trillion, four hundred five billion, twelve million, three hundred fifty-two thousand, six hundred sixty-one".