155450253330225 has 144 divisors (see below), whose sum is σ = 328481321119744. Its totient is φ = 68768008560000.

The previous prime is 155450253330217. The next prime is 155450253330293. The reversal of 155450253330225 is 522033352054551.

155450253330225 is a `hidden beast` number, since 1 + 5 + 5 + 45 + 0 + 2 + 53 + 330 + 225 = 666.

It is not a de Polignac number, because 155450253330225 - 2³ = 155450253330217 is a prime.

It is a super-2 number, since 2×155450253330225² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1894515450 + ... + 1894597500.

Almost surely, 2^{155450253330225} is an apocalyptic number.

155450253330225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155450253330225 is an abundant number, since it is smaller than the sum of its proper divisors (173031067789519).

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

155450253330225 is a wasteful number, since it uses less digits than its factorization.

155450253330225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120908 (or 120900 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 45.

The spelling of 155450253330225 in words is "one hundred fifty-five trillion, four hundred fifty billion, two hundred fifty-three million, three hundred thirty thousand, two hundred twenty-five".