61010005085 has 4 divisors (see below), whose sum is σ = 73212006108. Its totient is φ = 48808004064.

The previous prime is 61010005073. The next prime is 61010005129. The reversal of 61010005085 is 58050001016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45978509476 + 15031495609 = 214426^2 + 122603^2 .

It is a cyclic number.

It is not a de Polignac number, because 61010005085 - 2¹⁴ = 61009988701 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6101000504 + ... + 6101000513.

It is an arithmetic number, because the mean of its divisors is an integer number (18303001527).

Almost surely, 2^61010005085 is an apocalyptic number.

It is an amenable number.

61010005085 is a deficient number, since it is larger than the sum of its proper divisors (12202001023).

61010005085 is a wasteful number, since it uses less digits than its factorization.

61010005085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12202001022.

The product of its (nonzero) digits is 1200, while the sum is 26.

The spelling of 61010005085 in words is "sixty-one billion, ten million, five thousand, eighty-five".