155993539808 has 24 divisors (see below), whose sum is σ = 312906856248. Its totient is φ = 76525131904.

The previous prime is 155993539783. The next prime is 155993539817. The reversal of 155993539808 is 808935399551.

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, 45986966 + ... + 45990357.

It is an arithmetic number, because the mean of its divisors is an integer number (13037785677).

Almost surely, 2^155993539808 is an apocalyptic number.

It is an amenable number.

155993539808 is an abundant number, since it is smaller than the sum of its proper divisors (156913316440).

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

155993539808 is an equidigital number, since it uses as much as digits as its factorization.

155993539808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91977386 (or 91977378 counting only the distinct ones).

The product of its (nonzero) digits is 52488000, while the sum is 65.

The spelling of 155993539808 in words is "one hundred fifty-five billion, nine hundred ninety-three million, five hundred thirty-nine thousand, eight hundred eight".