61505461 has 2 divisors, whose sum is σ = 61505462. Its totient is φ = 61505460.

The previous prime is 61505459. The next prime is 61505501. The reversal of 61505461 is 16450516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51926436 + 9579025 = 7206^2 + 3095^2 .

It is a cyclic number.

It is not a de Polignac number, because 61505461 - 2¹ = 61505459 is a prime.

Together with 61505459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61505401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30752730 + 30752731.

It is an arithmetic number, because the mean of its divisors is an integer number (30752731).

Almost surely, 2^61505461 is an apocalyptic number.

It is an amenable number.

61505461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61505461 is an equidigital number, since it uses as much as digits as its factorization.

61505461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 61505461 is about 7842.5417435931. The cubic root of 61505461 is about 394.7340216559.

Adding to 61505461 its reverse (16450516), we get a palindrome (77955977).

It can be divided in two parts, 6150 and 5461, that added together give a palindrome (11611).

The spelling of 61505461 in words is "sixty-one million, five hundred five thousand, four hundred sixty-one".