61855255816 has 16 divisors (see below), whose sum is σ = 118807351740. Its totient is φ = 30173295360.

The previous prime is 61855255789. The next prime is 61855255843.

61855255816 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (61855255789) and next prime (61855255843).

It can be written as a sum of positive squares in 2 ways, for example, as 61687656900 + 167598916 = 248370^2 + 12946^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 94291221 + ... + 94291876.

Almost surely, 2^61855255816 is an apocalyptic number.

It is an amenable number.

61855255816 is a deficient number, since it is larger than the sum of its proper divisors (56952095924).

61855255816 is a wasteful number, since it uses less digits than its factorization.

61855255816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188583144 (or 188583140 counting only the distinct ones).

The product of its digits is 2880000, while the sum is 52.

The spelling of 61855255816 in words is "sixty-one billion, eight hundred fifty-five million, two hundred fifty-five thousand, eight hundred sixteen".