61858285816 has 32 divisors (see below), whose sum is σ = 117407984400. Its totient is φ = 30549657600.

The previous prime is 61858285813. The next prime is 61858285817.

61858285816 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61858285813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4288216 + ... + 4302616.

Almost surely, 2^61858285816 is an apocalyptic number.

It is an amenable number.

61858285816 is a deficient number, since it is larger than the sum of its proper divisors (55549698584).

61858285816 is a wasteful number, since it uses less digits than its factorization.

61858285816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20959 (or 20955 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 58.

The spelling of 61858285816 in words is "sixty-one billion, eight hundred fifty-eight million, two hundred eighty-five thousand, eight hundred sixteen".