61447783104 has 84 divisors (see below), whose sum is σ = 176765279184. Its totient is φ = 20408596992.

The previous prime is 61447783057. The next prime is 61447783123. The reversal of 61447783104 is 40138774416.

It is a self number, because there is not a number n which added to its sum of digits gives 61447783104.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33012 + ... + 352115.

Almost surely, 2^61447783104 is an apocalyptic number.

61447783104 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61447783104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88382639592).

61447783104 is an abundant number, since it is smaller than the sum of its proper divisors (115317496080).

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

61447783104 is a wasteful number, since it uses less digits than its factorization.

61447783104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385422 (or 385409 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 61447783104 in words is "sixty-one billion, four hundred forty-seven million, seven hundred eighty-three thousand, one hundred four".