61685012792 has 32 divisors (see below), whose sum is σ = 124766444880. Its totient is φ = 28421967360.

The previous prime is 61685012791. The next prime is 61685012867. The reversal of 61685012792 is 29721058616.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61685012791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438434 + ... + 561777.

Almost surely, 2^61685012792 is an apocalyptic number.

It is an amenable number.

61685012792 is an abundant number, since it is smaller than the sum of its proper divisors (63081432088).

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

61685012792 is a wasteful number, since it uses less digits than its factorization.

61685012792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000823 (or 1000819 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 61685012792 in words is "sixty-one billion, six hundred eighty-five million, twelve thousand, seven hundred ninety-two".