158869956 has 72 divisors (see below), whose sum is σ = 433243776. Its totient is φ = 45178560.

The previous prime is 158869951. The next prime is 158869961. The reversal of 158869956 is 659968851.

It is an interprime number because it is at equal distance from previous prime (158869951) and next prime (158869961).

Its product of digits (4665600) is a multiple of the sum of its prime divisors (1280).

It is a junction number, because it is equal to n+sod(n) for n = 158869896 and 158869905.

It is not an unprimeable number, because it can be changed into a prime (158869951) 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, 158850 + ... + 159846.

Almost surely, 2^158869956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158869956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216621888).

158869956 is an abundant number, since it is smaller than the sum of its proper divisors (274373820).

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

158869956 is a wasteful number, since it uses less digits than its factorization.

158869956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289 (or 1280 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 57.

The square root of 158869956 is about 12604.3625780918. The cubic root of 158869956 is about 541.6024144484.

The spelling of 158869956 in words is "one hundred fifty-eight million, eight hundred sixty-nine thousand, nine hundred fifty-six".