155340002550 has 48 divisors (see below), whose sum is σ = 394639397712. Its totient is φ = 40413657600.

The previous prime is 155340002549. The next prime is 155340002581. The reversal of 155340002550 is 55200043551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

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, 12623119 + ... + 12635418.

It is an arithmetic number, because the mean of its divisors is an integer number (8221654119).

Almost surely, 2^155340002550 is an apocalyptic number.

155340002550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155340002550 is an abundant number, since it is smaller than the sum of its proper divisors (239299395162).

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

155340002550 is a wasteful number, since it uses less digits than its factorization.

155340002550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25258593 (or 25258588 counting only the distinct ones).

The product of its (nonzero) digits is 15000, while the sum is 30.

The spelling of 155340002550 in words is "one hundred fifty-five billion, three hundred forty million, two thousand, five hundred fifty".