155994857 has 8 divisors (see below), whose sum is σ = 162224640. Its totient is φ = 149821840.

The previous prime is 155994851. The next prime is 155994859. The reversal of 155994857 is 758499551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155994857 - 2⁶ = 155994793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155994799 and 155994808.

It is not an unprimeable number, because it can be changed into a prime (155994851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8543 + ... + 19620.

It is an arithmetic number, because the mean of its divisors is an integer number (20278080).

Almost surely, 2^155994857 is an apocalyptic number.

It is an amenable number.

155994857 is a deficient number, since it is larger than the sum of its proper divisors (6229783).

155994857 is a wasteful number, since it uses less digits than its factorization.

155994857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28383.

The product of its digits is 2268000, while the sum is 53.

The square root of 155994857 is about 12489.7901103261. The cubic root of 155994857 is about 538.3153453611.

The spelling of 155994857 in words is "one hundred fifty-five million, nine hundred ninety-four thousand, eight hundred fifty-seven".