61331850384 has 240 divisors, whose sum is σ = 188550717696. Its totient is φ = 17124307200.

The previous prime is 61331850383. The next prime is 61331850403. The reversal of 61331850384 is 48305813316.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (61331850383) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20642019 + ... + 20644989.

Almost surely, 2^61331850384 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 61331850384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94275358848).

61331850384 is an abundant number, since it is smaller than the sum of its proper divisors (127218867312).

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

61331850384 is a wasteful number, since it uses less digits than its factorization.

61331850384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3194 (or 3181 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 61331850384 in words is "sixty-one billion, three hundred thirty-one million, eight hundred fifty thousand, three hundred eighty-four".