61240729512 has 16 divisors (see below), whose sum is σ = 153101823840. Its totient is φ = 20413576496.

The previous prime is 61240729481. The next prime is 61240729523. The reversal of 61240729512 is 21592704216.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1275848508 + ... + 1275848555.

It is an arithmetic number, because the mean of its divisors is an integer number (9568863990).

Almost surely, 2^61240729512 is an apocalyptic number.

It is an amenable number.

61240729512 is an abundant number, since it is smaller than the sum of its proper divisors (91861094328).

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

61240729512 is a wasteful number, since it uses less digits than its factorization.

61240729512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2551697072 (or 2551697068 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 61240729512 in words is "sixty-one billion, two hundred forty million, seven hundred twenty-nine thousand, five hundred twelve".