61881214392 has 96 divisors (see below), whose sum is σ = 171883464480. Its totient is φ = 20100433920.

The previous prime is 61881214379. The next prime is 61881214393. The reversal of 61881214392 is 29341218816.

61881214392 is a `hidden beast` number, since 61 + 88 + 121 + 4 + 392 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61881214393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2606608 + ... + 2630240.

It is an arithmetic number, because the mean of its divisors is an integer number (1790452755).

Almost surely, 2^61881214392 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 61881214392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85941732240).

61881214392 is an abundant number, since it is smaller than the sum of its proper divisors (110002250088).

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

61881214392 is a wasteful number, since it uses less digits than its factorization.

61881214392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24573 (or 24566 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The spelling of 61881214392 in words is "sixty-one billion, eight hundred eighty-one million, two hundred fourteen thousand, three hundred ninety-two".