155499906 has 32 divisors (see below), whose sum is σ = 322380288. Its totient is φ = 49950720.

The previous prime is 155499893. The next prime is 155499917. The reversal of 155499906 is 609994551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46176 + ... + 49428.

It is an arithmetic number, because the mean of its divisors is an integer number (10074384).

Almost surely, 2^155499906 is an apocalyptic number.

155499906 is an abundant number, since it is smaller than the sum of its proper divisors (166880382).

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

155499906 is a wasteful number, since it uses less digits than its factorization.

155499906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3546.

The product of its (nonzero) digits is 437400, while the sum is 48.

The square root of 155499906 is about 12469.9601442827. The cubic root of 155499906 is about 537.7454077490.

The spelling of 155499906 in words is "one hundred fifty-five million, four hundred ninety-nine thousand, nine hundred six".