61455556065 has 16 divisors (see below), whose sum is σ = 98354086848. Its totient is φ = 32767897536.

The previous prime is 61455556051. The next prime is 61455556133. The reversal of 61455556065 is 56065555416.

It is not a de Polignac number, because 61455556065 - 2⁸ = 61455555809 is a prime.

It is a super-3 number, since 3×61455556065³ (a number of 33 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 464227 + ... + 581736.

It is an arithmetic number, because the mean of its divisors is an integer number (6147130428).

Almost surely, 2^61455556065 is an apocalyptic number.

It is an amenable number.

61455556065 is a deficient number, since it is larger than the sum of its proper divisors (36898530783).

61455556065 is a wasteful number, since it uses less digits than its factorization.

61455556065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1049888.

The product of its (nonzero) digits is 2700000, while the sum is 48.

The spelling of 61455556065 in words is "sixty-one billion, four hundred fifty-five million, five hundred fifty-six thousand, sixty-five".