158956081990 has 16 divisors (see below), whose sum is σ = 286129584000. Its totient is φ = 63580513600.

The previous prime is 158956081943. The next prime is 158956082041. The reversal of 158956081990 is 99180659851.

It is a super-2 number, since 2×158956081990² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136011 + ... + 580009.

It is an arithmetic number, because the mean of its divisors is an integer number (17883099000).

Almost surely, 2^158956081990 is an apocalyptic number.

158956081990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

158956081990 is a deficient number, since it is larger than the sum of its proper divisors (127173502010).

158956081990 is a wasteful number, since it uses less digits than its factorization.

158956081990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479807.

The product of its (nonzero) digits is 6998400, while the sum is 61.

The spelling of 158956081990 in words is "one hundred fifty-eight billion, nine hundred fifty-six million, eighty-one thousand, nine hundred ninety".