155662638 has 8 divisors (see below), whose sum is σ = 311325288. Its totient is φ = 51887544.

The previous prime is 155662621. The next prime is 155662651. The reversal of 155662638 is 836266551.

It is a happy number.

155662638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

155662638 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 155662638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12971881 + ... + 12971892.

It is an arithmetic number, because the mean of its divisors is an integer number (38915661).

Almost surely, 2^155662638 is an apocalyptic number.

155662638 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.

155662638 is a wasteful number, since it uses less digits than its factorization.

155662638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25943778.

The product of its digits is 259200, while the sum is 42.

The square root of 155662638 is about 12476.4833987787. The cubic root of 155662638 is about 537.9329274279.

The spelling of 155662638 in words is "one hundred fifty-five million, six hundred sixty-two thousand, six hundred thirty-eight".