61564043 has 4 divisors (see below), whose sum is σ = 61704720. Its totient is φ = 61423368.

The previous prime is 61564037. The next prime is 61564051. The reversal of 61564043 is 34046516.

It is a happy number.

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 61564043 - 2⁶ = 61563979 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61563997 and 61564015.

It is not an unprimeable number, because it can be changed into a prime (61564843) 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, 69680 + ... + 70557.

It is an arithmetic number, because the mean of its divisors is an integer number (15426180).

Almost surely, 2^61564043 is an apocalyptic number.

61564043 is a deficient number, since it is larger than the sum of its proper divisors (140677).

61564043 is a wasteful number, since it uses less digits than its factorization.

61564043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140676.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 61564043 is about 7846.2757407575. The cubic root of 61564043 is about 394.8593057648.

The spelling of 61564043 in words is "sixty-one million, five hundred sixty-four thousand, forty-three".