157896990720 has 672 divisors, whose sum is σ = 640531786752. Its totient is φ = 35226648576.

The previous prime is 157896990697. The next prime is 157896990731. The reversal of 157896990720 is 27099698751.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×157896990720² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110959929 + ... + 110961351.

Almost surely, 2^157896990720 is an apocalyptic number.

157896990720 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 157896990720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (320265893376).

157896990720 is an abundant number, since it is smaller than the sum of its proper divisors (482634796032).

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

157896990720 is a wasteful number, since it uses less digits than its factorization.

157896990720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 17146080, while the sum is 63.

The spelling of 157896990720 in words is "one hundred fifty-seven billion, eight hundred ninety-six million, nine hundred ninety thousand, seven hundred twenty".