155490877 has 8 divisors (see below), whose sum is σ = 156553560. Its totient is φ = 154432320.

The previous prime is 155490859. The next prime is 155490883. The reversal of 155490877 is 778094551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1879641 + 153611236 = 1371^2 + 12394^2 .

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 155490877 - 2¹¹ = 155488829 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 (155490827) 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, 112563 + ... + 113935.

It is an arithmetic number, because the mean of its divisors is an integer number (19569195).

Almost surely, 2^155490877 is an apocalyptic number.

It is an amenable number.

155490877 is a deficient number, since it is larger than the sum of its proper divisors (1062683).

155490877 is a wasteful number, since it uses less digits than its factorization.

155490877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2063.

The product of its (nonzero) digits is 352800, while the sum is 46.

The square root of 155490877 is about 12469.5981090009. The cubic root of 155490877 is about 537.7349996028.

The spelling of 155490877 in words is "one hundred fifty-five million, four hundred ninety thousand, eight hundred seventy-seven".