61656411 has 4 divisors (see below), whose sum is σ = 82208552. Its totient is φ = 41104272.

The previous prime is 61656403. The next prime is 61656449. The reversal of 61656411 is 11465616.

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

It is not a de Polignac number, because 61656411 - 2³ = 61656403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61656451) 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, 10276066 + ... + 10276071.

It is an arithmetic number, because the mean of its divisors is an integer number (20552138).

Almost surely, 2^61656411 is an apocalyptic number.

61656411 is a deficient number, since it is larger than the sum of its proper divisors (20552141).

61656411 is a wasteful number, since it uses less digits than its factorization.

61656411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20552140.

The product of its digits is 4320, while the sum is 30.

The square root of 61656411 is about 7852.1596392330. The cubic root of 61656411 is about 395.0566836348.

The spelling of 61656411 in words is "sixty-one million, six hundred fifty-six thousand, four hundred eleven".