23361613851581 has 8 divisors (see below), whose sum is σ = 23702338355904. Its totient is φ = 23021214005440.

The previous prime is 23361613851509. The next prime is 23361613851617. The reversal of 23361613851581 is 18515831616332.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23361613851581 - 2⁴² = 18963567340477 is a prime.

It is a super-2 number, since 2×23361613851581² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23361613851481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81019580 + ... + 81307413.

It is an arithmetic number, because the mean of its divisors is an integer number (2962792294488).

Almost surely, 2^{23361613851581} is an apocalyptic number.

It is an amenable number.

23361613851581 is a deficient number, since it is larger than the sum of its proper divisors (340724504323).

23361613851581 is a wasteful number, since it uses less digits than its factorization.

23361613851581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162329091.

The product of its digits is 3110400, while the sum is 53.

The spelling of 23361613851581 in words is "twenty-three trillion, three hundred sixty-one billion, six hundred thirteen million, eight hundred fifty-one thousand, five hundred eighty-one".