155112639 has 8 divisors (see below), whose sum is σ = 225618432. Its totient is φ = 94007640.

The previous prime is 155112631. The next prime is 155112647. The reversal of 155112639 is 936211551.

It is an interprime number because it is at equal distance from previous prime (155112631) and next prime (155112647).

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

It is not a de Polignac number, because 155112639 - 2³ = 155112631 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 4700383 = 155112639 / (1 + 5 + 5 + 1 + 1 + 2 + 6 + 3 + 9).

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2350159 + ... + 2350224.

It is an arithmetic number, because the mean of its divisors is an integer number (28202304).

Almost surely, 2^155112639 is an apocalyptic number.

155112639 is a deficient number, since it is larger than the sum of its proper divisors (70505793).

155112639 is a wasteful number, since it uses less digits than its factorization.

155112639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4700397.

The product of its digits is 8100, while the sum is 33.

The square root of 155112639 is about 12454.4224675414. The cubic root of 155112639 is about 537.2986246900.

The spelling of 155112639 in words is "one hundred fifty-five million, one hundred twelve thousand, six hundred thirty-nine".