61564425211 has 4 divisors (see below), whose sum is σ = 61580763400. Its totient is φ = 61548087024.

The previous prime is 61564425179. The next prime is 61564425257. The reversal of 61564425211 is 11252446516.

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 61564425211 - 2⁵ = 61564425179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61564423211) 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, 8163441 + ... + 8170978.

It is an arithmetic number, because the mean of its divisors is an integer number (15395190850).

Almost surely, 2^61564425211 is an apocalyptic number.

61564425211 is a deficient number, since it is larger than the sum of its proper divisors (16338189).

61564425211 is a wasteful number, since it uses less digits than its factorization.

61564425211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16338188.

The product of its digits is 57600, while the sum is 37.

The spelling of 61564425211 in words is "sixty-one billion, five hundred sixty-four million, four hundred twenty-five thousand, two hundred eleven".