61085646 has 24 divisors (see below), whose sum is σ = 139318920. Its totient is φ = 19290096.

The previous prime is 61085639. The next prime is 61085657. The reversal of 61085646 is 64658016.

61085646 is a `hidden beast` number, since 6 + 1 + 0 + 8 + 5 + 646 = 666.

It is a super-2 number, since 2×61085646² = 7462912294474632, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61085646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88965 + ... + 89648.

It is an arithmetic number, because the mean of its divisors is an integer number (5804955).

Almost surely, 2^61085646 is an apocalyptic number.

61085646 is an abundant number, since it is smaller than the sum of its proper divisors (78233274).

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

61085646 is a wasteful number, since it uses less digits than its factorization.

61085646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178640 (or 178637 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 61085646 is about 7815.7306760149. The cubic root of 61085646 is about 393.8338645250.

The spelling of 61085646 in words is "sixty-one million, eighty-five thousand, six hundred forty-six".