61384976730 has 192 divisors, whose sum is σ = 199150638336. Its totient is φ = 12744576000.

The previous prime is 61384976729. The next prime is 61384976791. The reversal of 61384976730 is 3767948316.

61384976730 is a `hidden beast` number, since 61 + 3 + 8 + 497 + 67 + 30 = 666.

61384976730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10260340 + ... + 10266320.

It is an arithmetic number, because the mean of its divisors is an integer number (1037242908).

Almost surely, 2^61384976730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61384976730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99575319168).

61384976730 is an abundant number, since it is smaller than the sum of its proper divisors (137765661606).

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

61384976730 is a wasteful number, since it uses less digits than its factorization.

61384976730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7493 (or 7490 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 54.

The spelling of 61384976730 in words is "sixty-one billion, three hundred eighty-four million, nine hundred seventy-six thousand, seven hundred thirty".