155112638 has 8 divisors (see below), whose sum is σ = 236141832. Its totient is φ = 76398696.

The previous prime is 155112631. The next prime is 155112647. The reversal of 155112638 is 836211551.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155112631) 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 3 ways as a sum of consecutive naturals, for example, 578645 + ... + 578912.

It is an arithmetic number, because the mean of its divisors is an integer number (29517729).

Almost surely, 2^155112638 is an apocalyptic number.

155112638 is a deficient number, since it is larger than the sum of its proper divisors (81029194).

155112638 is a wasteful number, since it uses less digits than its factorization.

155112638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157626.

The product of its digits is 7200, while the sum is 32.

The square root of 155112638 is about 12454.4224273950. The cubic root of 155112638 is about 537.2986235354.

The spelling of 155112638 in words is "one hundred fifty-five million, one hundred twelve thousand, six hundred thirty-eight".