61933922388 has 144 divisors (see below), whose sum is σ = 171180225216. Its totient is φ = 18766218240.

The previous prime is 61933922381. The next prime is 61933922429. The reversal of 61933922388 is 88322933916.

It is a happy number.

61933922388 is a `hidden beast` number, since 6 + 1 + 9 + 339 + 223 + 88 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61933922381) 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 47 ways as a sum of consecutive naturals, for example, 12854956 + ... + 12859772.

It is an arithmetic number, because the mean of its divisors is an integer number (1188751564).

Almost surely, 2^61933922388 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 61933922388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85590112608).

61933922388 is an abundant number, since it is smaller than the sum of its proper divisors (109246302828).

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

61933922388 is a wasteful number, since it uses less digits than its factorization.

61933922388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5254 (or 5249 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The spelling of 61933922388 in words is "sixty-one billion, nine hundred thirty-three million, nine hundred twenty-two thousand, three hundred eighty-eight".