15722318656 has 112 divisors (see below), whose sum is σ = 35656040448. Its totient is φ = 6808665600.

The previous prime is 15722318653. The next prime is 15722318681. The reversal of 15722318656 is 65681322751.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15722318653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4386241 + ... + 4389823.

It is an arithmetic number, because the mean of its divisors is an integer number (318357504).

Almost surely, 2^15722318656 is an apocalyptic number.

15722318656 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 15722318656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17828020224).

15722318656 is an abundant number, since it is smaller than the sum of its proper divisors (19933721792).

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

15722318656 is a wasteful number, since it uses less digits than its factorization.

15722318656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3900 (or 3890 counting only the distinct ones).

The product of its digits is 604800, while the sum is 46.

The spelling of 15722318656 in words is "fifteen billion, seven hundred twenty-two million, three hundred eighteen thousand, six hundred fifty-six".