61456647 has 8 divisors (see below), whose sum is σ = 93648256. Its totient is φ = 35118072.

The previous prime is 61456643. The next prime is 61456657. The reversal of 61456647 is 74665416.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61456647 - 2² = 61456643 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 (61456643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1463233 + ... + 1463274.

It is an arithmetic number, because the mean of its divisors is an integer number (11706032).

Almost surely, 2^61456647 is an apocalyptic number.

61456647 is a deficient number, since it is larger than the sum of its proper divisors (32191609).

61456647 is a wasteful number, since it uses less digits than its factorization.

61456647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2926517.

The product of its digits is 120960, while the sum is 39.

The square root of 61456647 is about 7839.4289970635. The cubic root of 61456647 is about 394.6295667236.

The spelling of 61456647 in words is "sixty-one million, four hundred fifty-six thousand, six hundred forty-seven".