61256265216 has 80 divisors (see below), whose sum is σ = 163246297104. Its totient is φ = 20411777024.

The previous prime is 61256265199. The next prime is 61256265241.

It is a happy number.

61256265216 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6527920 + ... + 6537296.

Almost surely, 2^61256265216 is an apocalyptic number.

It is an amenable number.

61256265216 is an abundant number, since it is smaller than the sum of its proper divisors (101990031888).

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

61256265216 is an equidigital number, since it uses as much as digits as its factorization.

61256265216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13651 (or 13635 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 61256265216 in words is "sixty-one billion, two hundred fifty-six million, two hundred sixty-five thousand, two hundred sixteen".