23661351936 has 440 divisors, whose sum is σ = 75138328320. Its totient is φ = 7401259008.

The previous prime is 23661351899. The next prime is 23661351953. The reversal of 23661351936 is 63915316632.

23661351936 is a `hidden beast` number, since 23 + 6 + 613 + 5 + 1 + 9 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 23661351891 and 23661351900.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 150709170 + ... + 150709326.

It is an arithmetic number, because the mean of its divisors is an integer number (170768928).

Almost surely, 2^23661351936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23661351936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37569164160).

23661351936 is an abundant number, since it is smaller than the sum of its proper divisors (51476976384).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23661351936 is a wasteful number, since it uses less digits than its factorization.

23661351936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 264 counting only the distinct ones).

The product of its digits is 524880, while the sum is 45.

The spelling of 23661351936 in words is "twenty-three billion, six hundred sixty-one million, three hundred fifty-one thousand, nine hundred thirty-six".