155906879 has 6 divisors (see below), whose sum is σ = 156578760. Its totient is φ = 155236676.

The previous prime is 155906869. The next prime is 155906897. The reversal of 155906879 is 978609551.

It is a happy number.

It is not a de Polignac number, because 155906879 - 2¹² = 155902783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155906819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236252 + ... + 236910.

It is an arithmetic number, because the mean of its divisors is an integer number (26096460).

Almost surely, 2^155906879 is an apocalyptic number.

155906879 is a deficient number, since it is larger than the sum of its proper divisors (671881).

155906879 is an frugal number, since it uses more digits than its factorization.

155906879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1677 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 155906879 is about 12486.2676168661. The cubic root of 155906879 is about 538.2141266105.

The spelling of 155906879 in words is "one hundred fifty-five million, nine hundred six thousand, eight hundred seventy-nine".