61485861 has 4 divisors (see below), whose sum is σ = 81981152. Its totient is φ = 40990572.

The previous prime is 61485799. The next prime is 61485863. The reversal of 61485861 is 16858416.

61485861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 61485861 - 2⁶ = 61485797 is a prime.

It is a super-2 number, since 2×61485861² = 7561022205822642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61485863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10247641 + ... + 10247646.

It is an arithmetic number, because the mean of its divisors is an integer number (20495288).

Almost surely, 2^61485861 is an apocalyptic number.

It is an amenable number.

61485861 is a deficient number, since it is larger than the sum of its proper divisors (20495291).

61485861 is a wasteful number, since it uses less digits than its factorization.

61485861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20495290.

The product of its digits is 46080, while the sum is 39.

The square root of 61485861 is about 7841.2920491460. The cubic root of 61485861 is about 394.6920871205.

The spelling of 61485861 in words is "sixty-one million, four hundred eighty-five thousand, eight hundred sixty-one".