61085364894 has 32 divisors (see below), whose sum is σ = 135757440000. Its totient is φ = 20359960632.

The previous prime is 61085364877. The next prime is 61085364917. The reversal of 61085364894 is 49846358016.

61085364894 is a `hidden beast` number, since 6 + 10 + 8 + 536 + 4 + 8 + 94 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 61085364894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 643507 + ... + 732305.

It is an arithmetic number, because the mean of its divisors is an integer number (4242420000).

Almost surely, 2^61085364894 is an apocalyptic number.

61085364894 is an abundant number, since it is smaller than the sum of its proper divisors (74672075106).

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

61085364894 is a wasteful number, since it uses less digits than its factorization.

61085364894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101549 (or 101543 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 61085364894 in words is "sixty-one billion, eighty-five million, three hundred sixty-four thousand, eight hundred ninety-four".