23156987616 has 360 divisors, whose sum is σ = 81173606976. Its totient is φ = 6453457920.

The previous prime is 23156987551. The next prime is 23156987621. The reversal of 23156987616 is 61678965132.

23156987616 is a `hidden beast` number, since 2 + 3 + 1 + 569 + 8 + 76 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5205105 + ... + 5209551.

Almost surely, 2^23156987616 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 23156987616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40586803488).

23156987616 is an abundant number, since it is smaller than the sum of its proper divisors (58016619360).

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

23156987616 is a wasteful number, since it uses less digits than its factorization.

23156987616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4524 (or 4500 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The spelling of 23156987616 in words is "twenty-three billion, one hundred fifty-six million, nine hundred eighty-seven thousand, six hundred sixteen".