155979768 has 64 divisors (see below), whose sum is σ = 448081920. Its totient is φ = 44323200.

The previous prime is 155979751. The next prime is 155979781. The reversal of 155979768 is 867979551.

155979768 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 29658 + ... + 34518.

It is an arithmetic number, because the mean of its divisors is an integer number (7001280).

Almost surely, 2^155979768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155979768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224040960).

155979768 is an abundant number, since it is smaller than the sum of its proper divisors (292102152).

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

155979768 is a wasteful number, since it uses less digits than its factorization.

155979768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5068 (or 5064 counting only the distinct ones).

The product of its digits is 4762800, while the sum is 57.

The square root of 155979768 is about 12489.1860423328. The cubic root of 155979768 is about 538.2979881604.

The spelling of 155979768 in words is "one hundred fifty-five million, nine hundred seventy-nine thousand, seven hundred sixty-eight".