61195874885 has 4 divisors (see below), whose sum is σ = 73435049868. Its totient is φ = 48956699904.

The previous prime is 61195874881. The next prime is 61195874891. The reversal of 61195874885 is 58847859116.

It is a Cunningham number, because it is equal to 247378²+1.

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 22030277476 + 39165597409 = 148426^2 + 197903^2 .

It is a cyclic number.

It is not a de Polignac number, because 61195874885 - 2² = 61195874881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61195874881) 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, 6119587484 + ... + 6119587493.

It is an arithmetic number, because the mean of its divisors is an integer number (18358762467).

Almost surely, 2^61195874885 is an apocalyptic number.

It is an amenable number.

61195874885 is a deficient number, since it is larger than the sum of its proper divisors (12239174983).

61195874885 is a wasteful number, since it uses less digits than its factorization.

61195874885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12239174982.

The product of its digits is 19353600, while the sum is 62.

The spelling of 61195874885 in words is "sixty-one billion, one hundred ninety-five million, eight hundred seventy-four thousand, eight hundred eighty-five".