61784097738 has 48 divisors (see below), whose sum is σ = 135945632928. Its totient is φ = 18705535200.

The previous prime is 61784097707. The next prime is 61784097757. The reversal of 61784097738 is 83779048716.

61784097738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 777408 + ... + 853188.

It is an arithmetic number, because the mean of its divisors is an integer number (2832200686).

Almost surely, 2^61784097738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61784097738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67972816464).

61784097738 is an abundant number, since it is smaller than the sum of its proper divisors (74161535190).

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

61784097738 is a wasteful number, since it uses less digits than its factorization.

61784097738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76931 (or 76920 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 60.

The spelling of 61784097738 in words is "sixty-one billion, seven hundred eighty-four million, ninety-seven thousand, seven hundred thirty-eight".