158897849640 has 192 divisors, whose sum is σ = 484287431040. Its totient is φ = 41706009600.

The previous prime is 158897849639. The next prime is 158897849659. The reversal of 158897849640 is 46948798851.

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, 542313334 + ... + 542313626.

It is an arithmetic number, because the mean of its divisors is an integer number (2522330370).

Almost surely, 2^158897849640 is an apocalyptic number.

158897849640 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 158897849640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242143715520).

158897849640 is an abundant number, since it is smaller than the sum of its proper divisors (325389581400).

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

158897849640 is a wasteful number, since it uses less digits than its factorization.

158897849640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 139345920, while the sum is 69.

The spelling of 158897849640 in words is "one hundred fifty-eight billion, eight hundred ninety-seven million, eight hundred forty-nine thousand, six hundred forty".