61567651 has 2 divisors, whose sum is σ = 61567652. Its totient is φ = 61567650.

The previous prime is 61567637. The next prime is 61567661. The reversal of 61567651 is 15676516.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61567651 - 2⁹ = 61567139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61567651.

It is not a weakly prime, because it can be changed into another prime (61567601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30783825 + 30783826.

It is an arithmetic number, because the mean of its divisors is an integer number (30783826).

Almost surely, 2^61567651 is an apocalyptic number.

61567651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61567651 is an equidigital number, since it uses as much as digits as its factorization.

61567651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 61567651 is about 7846.5056553857. The cubic root of 61567651 is about 394.8670192746.

The spelling of 61567651 in words is "sixty-one million, five hundred sixty-seven thousand, six hundred fifty-one".