61782289950 has 144 divisors (see below), whose sum is σ = 163412219520. Its totient is φ = 15444334080.

The previous prime is 61782289931. The next prime is 61782289951. The reversal of 61782289950 is 5998228716.

It is a happy number.

61782289950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61782289951) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 11398341 + ... + 11403759.

It is an arithmetic number, because the mean of its divisors is an integer number (1134807080).

Almost surely, 2^61782289950 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61782289950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81706109760).

61782289950 is an abundant number, since it is smaller than the sum of its proper divisors (101629929570).

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

61782289950 is a wasteful number, since it uses less digits than its factorization.

61782289950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5731 (or 5709 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 61782289950 in words is "sixty-one billion, seven hundred eighty-two million, two hundred eighty-nine thousand, nine hundred fifty".