15723797616 has 120 divisors (see below), whose sum is σ = 45443214960. Its totient is φ = 5072191488.

The previous prime is 15723797603. The next prime is 15723797623. The reversal of 15723797616 is 61679732751.

15723797616 is a `hidden beast` number, since 1 + 572 + 3 + 7 + 9 + 7 + 61 + 6 = 666.

It is a super-2 number, since 2×15723797616² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 663280 + ... + 686576.

It is an arithmetic number, because the mean of its divisors is an integer number (378693458).

Almost surely, 2^15723797616 is an apocalyptic number.

15723797616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15723797616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22721607480).

15723797616 is an abundant number, since it is smaller than the sum of its proper divisors (29719417344).

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

15723797616 is a wasteful number, since it uses less digits than its factorization.

15723797616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23463 (or 23454 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The spelling of 15723797616 in words is "fifteen billion, seven hundred twenty-three million, seven hundred ninety-seven thousand, six hundred sixteen".