61190871255 has 144 divisors (see below), whose sum is σ = 117769845024. Its totient is φ = 30412247040.

The previous prime is 61190871253. The next prime is 61190871271. The reversal of 61190871255 is 55217809116.

61190871255 is a `hidden beast` number, since 611 + 9 + 0 + 8 + 7 + 1 + 25 + 5 = 666.

It is not a de Polignac number, because 61190871255 - 2¹ = 61190871253 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 61190871255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61190871253) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 63017920 + ... + 63018890.

It is an arithmetic number, because the mean of its divisors is an integer number (817846146).

Almost surely, 2^61190871255 is an apocalyptic number.

61190871255 is a deficient number, since it is larger than the sum of its proper divisors (56578973769).

61190871255 is an equidigital number, since it uses as much as digits as its factorization.

61190871255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1109 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 45.

The spelling of 61190871255 in words is "sixty-one billion, one hundred ninety million, eight hundred seventy-one thousand, two hundred fifty-five".