23523451335661 has 2 divisors, whose sum is σ = 23523451335662. Its totient is φ = 23523451335660.

The previous prime is 23523451335641. The next prime is 23523451335737. The reversal of 23523451335661 is 16653315432532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22005950102500 + 1517501233161 = 4691050^2 + 1231869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23523451335661 is a prime.

It is a super-2 number, since 2×23523451335661² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23523451335641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11761725667830 + 11761725667831.

It is an arithmetic number, because the mean of its divisors is an integer number (11761725667831).

Almost surely, 2^{23523451335661} is an apocalyptic number.

It is an amenable number.

23523451335661 is a deficient number, since it is larger than the sum of its proper divisors (1).

23523451335661 is an equidigital number, since it uses as much as digits as its factorization.

23523451335661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 49.

The spelling of 23523451335661 in words is "twenty-three trillion, five hundred twenty-three billion, four hundred fifty-one million, three hundred thirty-five thousand, six hundred sixty-one".