61904585887 has 8 divisors (see below), whose sum is σ = 63139193600. Its totient is φ = 60681253464.

The previous prime is 61904585861. The next prime is 61904585923. The reversal of 61904585887 is 78858540916.

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 61904585887 - 2¹⁹ = 61904061599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61904525887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2807733 + ... + 2829694.

It is an arithmetic number, because the mean of its divisors is an integer number (7892399200).

Almost surely, 2^61904585887 is an apocalyptic number.

61904585887 is a deficient number, since it is larger than the sum of its proper divisors (1234607713).

61904585887 is a wasteful number, since it uses less digits than its factorization.

61904585887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5637645.

The product of its (nonzero) digits is 19353600, while the sum is 61.

The spelling of 61904585887 in words is "sixty-one billion, nine hundred four million, five hundred eighty-five thousand, eight hundred eighty-seven".