155856651 has 16 divisors (see below), whose sum is σ = 211046400. Its totient is φ = 102293568.

The previous prime is 155856641. The next prime is 155856667. The reversal of 155856651 is 156658551.

It is not a de Polignac number, because 155856651 - 2⁷ = 155856523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (155856641) 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 15 ways as a sum of consecutive naturals, for example, 107590 + ... + 109028.

It is an arithmetic number, because the mean of its divisors is an integer number (13190400).

Almost surely, 2^155856651 is an apocalyptic number.

155856651 is a deficient number, since it is larger than the sum of its proper divisors (55189749).

155856651 is a wasteful number, since it uses less digits than its factorization.

155856651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1978.

The product of its digits is 180000, while the sum is 42.

The square root of 155856651 is about 12484.2561252163. The cubic root of 155856651 is about 538.1563221849.

The spelling of 155856651 in words is "one hundred fifty-five million, eight hundred fifty-six thousand, six hundred fifty-one".