61804811685 has 16 divisors (see below), whose sum is σ = 99117146880. Its totient is φ = 32886083520.

The previous prime is 61804811659. The next prime is 61804811707. The reversal of 61804811685 is 58611840816.

It is not a de Polignac number, because 61804811685 - 2¹¹ = 61804809637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4773490 + ... + 4786419.

It is an arithmetic number, because the mean of its divisors is an integer number (6194821680).

Almost surely, 2^61804811685 is an apocalyptic number.

It is an amenable number.

61804811685 is a deficient number, since it is larger than the sum of its proper divisors (37312335195).

61804811685 is a wasteful number, since it uses less digits than its factorization.

61804811685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560348.

The product of its (nonzero) digits is 368640, while the sum is 48.

The spelling of 61804811685 in words is "sixty-one billion, eight hundred four million, eight hundred eleven thousand, six hundred eighty-five".