159722640 has 480 divisors, whose sum is σ = 694526976. Its totient is φ = 31933440.

The previous prime is 159722621. The next prime is 159722659. The reversal of 159722640 is 46227951.

159722640 is a `hidden beast` number, since 1 + 5 + 9 + 7 + 2 + 2 + 640 = 666.

It is an interprime number because it is at equal distance from previous prime (159722621) and next prime (159722659).

It is a super-2 number, since 2×159722640² = 51022643457139200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 159722595 and 159722604.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2383887 + ... + 2383953.

Almost surely, 2^159722640 is an apocalyptic number.

159722640 is a gapful number since it is divisible by the number (10) 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 159722640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (347263488).

159722640 is an abundant number, since it is smaller than the sum of its proper divisors (534804336).

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

159722640 is a wasteful number, since it uses less digits than its factorization.

159722640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 159722640 is about 12638.1422685456. The cubic root of 159722640 is about 542.5696456842.

The spelling of 159722640 in words is "one hundred fifty-nine million, seven hundred twenty-two thousand, six hundred forty".