61804647684 has 144 divisors (see below), whose sum is σ = 175409986752. Its totient is φ = 18223785216.

The previous prime is 61804647677. The next prime is 61804647691. The reversal of 61804647684 is 48674640816.

It is an interprime number because it is at equal distance from previous prime (61804647677) and next prime (61804647691).

It is a self number, because there is not a number n which added to its sum of digits gives 61804647684.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1037599 + ... + 1095545.

It is an arithmetic number, because the mean of its divisors is an integer number (1218124908).

Almost surely, 2^61804647684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61804647684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87704993376).

61804647684 is an abundant number, since it is smaller than the sum of its proper divisors (113605339068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61804647684 is a wasteful number, since it uses less digits than its factorization.

61804647684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58066 (or 58061 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 61804647684 in words is "sixty-one billion, eight hundred four million, six hundred forty-seven thousand, six hundred eighty-four".