155898979000 has 32 divisors (see below), whose sum is σ = 364803613200. Its totient is φ = 62359591200.

The previous prime is 155898978953. The next prime is 155898979007. The reversal of 155898979000 is 979898551.

It is a self number, because there is not a number n which added to its sum of digits gives 155898979000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155898979007) 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, 77948490 + ... + 77950489.

Almost surely, 2^155898979000 is an apocalyptic number.

155898979000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155898979000 is an abundant number, since it is smaller than the sum of its proper divisors (208904634200).

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

155898979000 is a wasteful number, since it uses less digits than its factorization.

155898979000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155899000 (or 155898986 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 61.

The spelling of 155898979000 in words is "one hundred fifty-five billion, eight hundred ninety-eight million, nine hundred seventy-nine thousand".