61564670 has 32 divisors (see below), whose sum is σ = 114468768. Its totient is φ = 23822208.

The previous prime is 61564661. The next prime is 61564681. The reversal of 61564670 is 7646516.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 61564670.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83624 + ... + 84356.

It is an arithmetic number, because the mean of its divisors is an integer number (3577149).

Almost surely, 2^61564670 is an apocalyptic number.

61564670 is a deficient number, since it is larger than the sum of its proper divisors (52904098).

61564670 is a wasteful number, since it uses less digits than its factorization.

61564670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 61564670 is about 7846.3156959174. The cubic root of 61564670 is about 394.8606462439.

The spelling of 61564670 in words is "sixty-one million, five hundred sixty-four thousand, six hundred seventy".