61656211 has 2 divisors, whose sum is σ = 61656212. Its totient is φ = 61656210.

The previous prime is 61656209. The next prime is 61656277. The reversal of 61656211 is 11265616.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61656211 - 2¹ = 61656209 is a prime.

Together with 61656209, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61656211.

It is not a weakly prime, because it can be changed into another prime (61656011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30828105 + 30828106.

It is an arithmetic number, because the mean of its divisors is an integer number (30828106).

Almost surely, 2^61656211 is an apocalyptic number.

61656211 is a deficient number, since it is larger than the sum of its proper divisors (1).

61656211 is an equidigital number, since it uses as much as digits as its factorization.

61656211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 61656211 is about 7852.1469038729. The cubic root of 61656211 is about 395.0562564750.

The spelling of 61656211 in words is "sixty-one million, six hundred fifty-six thousand, two hundred eleven".