61385871582 has 24 divisors (see below), whose sum is σ = 152003110896. Its totient is φ = 17538820416.

The previous prime is 61385871577. The next prime is 61385871647. The reversal of 61385871582 is 28517858316.

61385871582 is a `hidden beast` number, since 6 + 1 + 3 + 8 + 58 + 7 + 1 + 582 = 666.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 243594603 + ... + 243594854.

It is an arithmetic number, because the mean of its divisors is an integer number (6333462954).

Almost surely, 2^61385871582 is an apocalyptic number.

61385871582 is an abundant number, since it is smaller than the sum of its proper divisors (90617239314).

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

61385871582 is a wasteful number, since it uses less digits than its factorization.

61385871582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487189472 (or 487189469 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 54.

The spelling of 61385871582 in words is "sixty-one billion, three hundred eighty-five million, eight hundred seventy-one thousand, five hundred eighty-two".