61456446251 has 4 divisors (see below), whose sum is σ = 61461109272. Its totient is φ = 61451783232.

The previous prime is 61456446211. The next prime is 61456446299. The reversal of 61456446251 is 15264465416.

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

It is a cyclic number.

It is not a de Polignac number, because 61456446251 - 2²² = 61452251947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61456446211) 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, 2311685 + ... + 2338118.

It is an arithmetic number, because the mean of its divisors is an integer number (15365277318).

Almost surely, 2^61456446251 is an apocalyptic number.

61456446251 is a deficient number, since it is larger than the sum of its proper divisors (4663021).

61456446251 is a wasteful number, since it uses less digits than its factorization.

61456446251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663020.

The product of its digits is 691200, while the sum is 44.

The spelling of 61456446251 in words is "sixty-one billion, four hundred fifty-six million, four hundred forty-six thousand, two hundred fifty-one".