61767222784 has 40 divisors (see below), whose sum is σ = 123584308848. Its totient is φ = 30840944640.

The previous prime is 61767222773. The next prime is 61767222809. The reversal of 61767222784 is 48722276716.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289254 + ... + 455194.

Almost surely, 2^61767222784 is an apocalyptic number.

61767222784 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 61767222784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61792154424).

61767222784 is an abundant number, since it is smaller than the sum of its proper divisors (61817086064).

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

61767222784 is an equidigital number, since it uses as much as digits as its factorization.

61767222784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166686 (or 166670 counting only the distinct ones).

The product of its digits is 3161088, while the sum is 52.

The spelling of 61767222784 in words is "sixty-one billion, seven hundred sixty-seven million, two hundred twenty-two thousand, seven hundred eighty-four".