155455554 has 8 divisors (see below), whose sum is σ = 310911120. Its totient is φ = 51818516.

The previous prime is 155455541. The next prime is 155455561. The reversal of 155455554 is 455554551.

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

155455554 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12954624 + ... + 12954635.

It is an arithmetic number, because the mean of its divisors is an integer number (38863890).

Almost surely, 2^155455554 is an apocalyptic number.

155455554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

155455554 is a wasteful number, since it uses less digits than its factorization.

155455554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25909264.

The product of its digits is 250000, while the sum is 39.

The square root of 155455554 is about 12468.1816637391. The cubic root of 155455554 is about 537.6942772739.

The spelling of 155455554 in words is "one hundred fifty-five million, four hundred fifty-five thousand, five hundred fifty-four".