155205505140 has 96 divisors (see below), whose sum is σ = 496893761280. Its totient is φ = 35458676736.

The previous prime is 155205505139. The next prime is 155205505151. The reversal of 155205505140 is 41505502551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 807394 + ... + 980966.

It is an arithmetic number, because the mean of its divisors is an integer number (5175976680).

Almost surely, 2^155205505140 is an apocalyptic number.

155205505140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155205505140 is an abundant number, since it is smaller than the sum of its proper divisors (341688256140).

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

155205505140 is a wasteful number, since it uses less digits than its factorization.

155205505140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175721 (or 175719 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 33.

The spelling of 155205505140 in words is "one hundred fifty-five billion, two hundred five million, five hundred five thousand, one hundred forty".