1010155521255 has 64 divisors (see below), whose sum is σ = 1751517831168. Its totient is φ = 495195402240.

The previous prime is 1010155521253. The next prime is 1010155521259. The reversal of 1010155521255 is 5521255510101.

It is not a de Polignac number, because 1010155521255 - 2¹ = 1010155521253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010155521251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5458035 + ... + 5640075.

It is an arithmetic number, because the mean of its divisors is an integer number (27367466112).

Almost surely, 2^{1010155521255} is an apocalyptic number.

1010155521255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1010155521255 is a deficient number, since it is larger than the sum of its proper divisors (741362309913).

1010155521255 is a wasteful number, since it uses less digits than its factorization.

1010155521255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182576.

The product of its (nonzero) digits is 12500, while the sum is 33.

The spelling of 1010155521255 in words is "one trillion, ten billion, one hundred fifty-five million, five hundred twenty-one thousand, two hundred fifty-five".