61585797607 has 4 divisors (see below), whose sum is σ = 61586526960. Its totient is φ = 61585068256.

The previous prime is 61585797601. The next prime is 61585797613. The reversal of 61585797607 is 70679758516.

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

It is an interprime number because it is at equal distance from previous prime (61585797601) and next prime (61585797613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61585797607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61585797601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218482 + ... + 413407.

It is an arithmetic number, because the mean of its divisors is an integer number (15396631740).

Almost surely, 2^61585797607 is an apocalyptic number.

61585797607 is a deficient number, since it is larger than the sum of its proper divisors (729353).

61585797607 is an equidigital number, since it uses as much as digits as its factorization.

61585797607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729352.

The product of its (nonzero) digits is 22226400, while the sum is 61.

The spelling of 61585797607 in words is "sixty-one billion, five hundred eighty-five million, seven hundred ninety-seven thousand, six hundred seven".