61081895 has 8 divisors (see below), whose sum is σ = 83769504. Its totient is φ = 41884704.

The previous prime is 61081883. The next prime is 61081897. The reversal of 61081895 is 59818016.

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 61081895 - 2⁴ = 61081879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61081897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 872564 + ... + 872633.

It is an arithmetic number, because the mean of its divisors is an integer number (10471188).

Almost surely, 2^61081895 is an apocalyptic number.

61081895 is a deficient number, since it is larger than the sum of its proper divisors (22687609).

61081895 is a wasteful number, since it uses less digits than its factorization.

61081895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745209.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 61081895 is about 7815.4907075628. The cubic root of 61081895 is about 393.8258031600.

The spelling of 61081895 in words is "sixty-one million, eighty-one thousand, eight hundred ninety-five".