61446881 has 4 divisors (see below), whose sum is σ = 62080452. Its totient is φ = 60813312.

The previous prime is 61446821. The next prime is 61446887. The reversal of 61446881 is 18864416.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47128225 + 14318656 = 6865^2 + 3784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61446881 is a prime.

It is a super-2 number, since 2×61446881² = 7551438369256322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61446887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316640 + ... + 316833.

It is an arithmetic number, because the mean of its divisors is an integer number (15520113).

Almost surely, 2^61446881 is an apocalyptic number.

It is an amenable number.

61446881 is a deficient number, since it is larger than the sum of its proper divisors (633571).

61446881 is an equidigital number, since it uses as much as digits as its factorization.

61446881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633570.

The product of its digits is 36864, while the sum is 38.

The square root of 61446881 is about 7838.8060953183. The cubic root of 61446881 is about 394.6086622503.

The spelling of 61446881 in words is "sixty-one million, four hundred forty-six thousand, eight hundred eighty-one".