158992554 has 48 divisors (see below), whose sum is σ = 371001600. Its totient is φ = 45291456.

The previous prime is 158992553. The next prime is 158992577. The reversal of 158992554 is 455299851.

Its product of digits (648000) is a multiple of the sum of its prime divisors (1620).

It is not an unprimeable number, because it can be changed into a prime (158992553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140262 + ... + 141390.

It is an arithmetic number, because the mean of its divisors is an integer number (7729200).

Almost surely, 2^158992554 is an apocalyptic number.

158992554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 158992554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185500800).

158992554 is an abundant number, since it is smaller than the sum of its proper divisors (212009046).

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

158992554 is a wasteful number, since it uses less digits than its factorization.

158992554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1620 counting only the distinct ones).

The product of its digits is 648000, while the sum is 48.

The square root of 158992554 is about 12609.2249563564. The cubic root of 158992554 is about 541.7416946118.

The spelling of 158992554 in words is "one hundred fifty-eight million, nine hundred ninety-two thousand, five hundred fifty-four".