155051105550 has 48 divisors (see below), whose sum is σ = 419483722752. Its totient is φ = 37588146400.

The previous prime is 155051105549. The next prime is 155051105581. The reversal of 155051105550 is 55501150551.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46983534 + ... + 46986833.

It is an arithmetic number, because the mean of its divisors is an integer number (8739244224).

Almost surely, 2^155051105550 is an apocalyptic number.

155051105550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155051105550 is an abundant number, since it is smaller than the sum of its proper divisors (264432617202).

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

155051105550 is a wasteful number, since it uses less digits than its factorization.

155051105550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93970393 (or 93970388 counting only the distinct ones).

The product of its (nonzero) digits is 15625, while the sum is 33.

The spelling of 155051105550 in words is "one hundred fifty-five billion, fifty-one million, one hundred five thousand, five hundred fifty".