155642998 has 16 divisors (see below), whose sum is σ = 268418304. Its totient is φ = 66303720.

The previous prime is 155642989. The next prime is 155643013. The reversal of 155642998 is 899246551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30948 + ... + 35623.

It is an arithmetic number, because the mean of its divisors is an integer number (16776144).

Almost surely, 2^155642998 is an apocalyptic number.

155642998 is a deficient number, since it is larger than the sum of its proper divisors (112775306).

155642998 is a wasteful number, since it uses less digits than its factorization.

155642998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66747.

The product of its digits is 777600, while the sum is 49.

The square root of 155642998 is about 12475.6962931934. The cubic root of 155642998 is about 537.9103027588.

The spelling of 155642998 in words is "one hundred fifty-five million, six hundred forty-two thousand, nine hundred ninety-eight".