61461905 has 8 divisors (see below), whose sum is σ = 74072232. Its totient is φ = 48957568.

The previous prime is 61461901. The next prime is 61461913. The reversal of 61461905 is 50916416.

It can be written as a sum of positive squares in 4 ways, for example, as 8288641 + 53173264 = 2879^2 + 7292^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61461905 - 2² = 61461901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61461901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25214 + ... + 27543.

It is an arithmetic number, because the mean of its divisors is an integer number (9259029).

Almost surely, 2^61461905 is an apocalyptic number.

It is an amenable number.

61461905 is a deficient number, since it is larger than the sum of its proper divisors (12610327).

61461905 is a wasteful number, since it uses less digits than its factorization.

61461905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52995.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 61461905 is about 7839.7643459482. The cubic root of 61461905 is about 394.6408207441.

The spelling of 61461905 in words is "sixty-one million, four hundred sixty-one thousand, nine hundred five".