158669856 has 36 divisors (see below), whose sum is σ = 451218222. Its totient is φ = 52889856.

The previous prime is 158669839. The next prime is 158669899. The reversal of 158669856 is 658966851.

It is a happy number.

158669856 is a `hidden beast` number, since 1 + 586 + 6 + 9 + 8 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 128595600 + 30074256 = 11340^2 + 5484^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×158669856² = 50352246406121472, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 275181 + ... + 275756.

Almost surely, 2^158669856 is an apocalyptic number.

158669856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

158669856 is an abundant number, since it is smaller than the sum of its proper divisors (292548366).

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

158669856 is a wasteful number, since it uses less digits than its factorization.

158669856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550953 (or 550942 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 54.

The square root of 158669856 is about 12596.4223492228. The cubic root of 158669856 is about 541.3749324295.

The spelling of 158669856 in words is "one hundred fifty-eight million, six hundred sixty-nine thousand, eight hundred fifty-six".