61456861 has 2 divisors, whose sum is σ = 61456862. Its totient is φ = 61456860.

The previous prime is 61456831. The next prime is 61456867. The reversal of 61456861 is 16865416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51753636 + 9703225 = 7194^2 + 3115^2 .

It is a cyclic number.

It is not a de Polignac number, because 61456861 - 2⁹ = 61456349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61456861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61456867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30728430 + 30728431.

It is an arithmetic number, because the mean of its divisors is an integer number (30728431).

Almost surely, 2^61456861 is an apocalyptic number.

It is an amenable number.

61456861 is a deficient number, since it is larger than the sum of its proper divisors (1).

61456861 is an equidigital number, since it uses as much as digits as its factorization.

61456861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 37.

The square root of 61456861 is about 7839.4426460049. The cubic root of 61456861 is about 394.6300247735.

It can be divided in two parts, 614 and 56861, that added together give a palindrome (57475).

The spelling of 61456861 in words is "sixty-one million, four hundred fifty-six thousand, eight hundred sixty-one".