155207017215500 has 48 divisors (see below), whose sum is σ = 343615579454784. Its totient is φ = 61232357462400.

The previous prime is 155207017215449. The next prime is 155207017215521. The reversal of 155207017215500 is 5512710702551.

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, 2126087024 + ... + 2126160023.

It is an arithmetic number, because the mean of its divisors is an integer number (7158657905308).

Almost surely, 2^{155207017215500} is an apocalyptic number.

155207017215500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155207017215500 is an abundant number, since it is smaller than the sum of its proper divisors (188408562239284).

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

155207017215500 is a wasteful number, since it uses less digits than its factorization.

155207017215500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4252247139 (or 4252247127 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 41.

The spelling of 155207017215500 in words is "one hundred fifty-five trillion, two hundred seven billion, seventeen million, two hundred fifteen thousand, five hundred".