61105827555 has 12 divisors (see below), whose sum is σ = 105916767840. Its totient is φ = 32589774672.

The previous prime is 61105827527. The next prime is 61105827557. The reversal of 61105827555 is 55572850116.

61105827555 is a `hidden beast` number, since 6 + 1 + 10 + 5 + 82 + 7 + 555 = 666.

It is not a de Polignac number, because 61105827555 - 2⁶ = 61105827491 is a prime.

It is a super-2 number, since 2×61105827555² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1357907279 = 61105827555 / (6 + 1 + 1 + 0 + 5 + 8 + 2 + 7 + 5 + 5 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 61105827555.

It is not an unprimeable number, because it can be changed into a prime (61105827557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 678953595 + ... + 678953684.

It is an arithmetic number, because the mean of its divisors is an integer number (8826397320).

Almost surely, 2^61105827555 is an apocalyptic number.

61105827555 is a deficient number, since it is larger than the sum of its proper divisors (44810940285).

61105827555 is a wasteful number, since it uses less digits than its factorization.

61105827555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1357907290 (or 1357907287 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 45.

The spelling of 61105827555 in words is "sixty-one billion, one hundred five million, eight hundred twenty-seven thousand, five hundred fifty-five".