61461563 has 2 divisors, whose sum is σ = 61461564. Its totient is φ = 61461562.

The previous prime is 61461559. The next prime is 61461601. The reversal of 61461563 is 36516416.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61461563 - 2² = 61461559 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61461263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30730781 + 30730782.

It is an arithmetic number, because the mean of its divisors is an integer number (30730782).

Almost surely, 2^61461563 is an apocalyptic number.

61461563 is a deficient number, since it is larger than the sum of its proper divisors (1).

61461563 is an equidigital number, since it uses as much as digits as its factorization.

61461563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 61461563 is about 7839.7425340377. The cubic root of 61461563 is about 394.6400887600.

Adding to 61461563 its reverse (36516416), we get a palindrome (97977979).

The spelling of 61461563 in words is "sixty-one million, four hundred sixty-one thousand, five hundred sixty-three".