61320501860 has 48 divisors (see below), whose sum is σ = 131087980800. Its totient is φ = 24088103424.

The previous prime is 61320501859. The next prime is 61320501887. The reversal of 61320501860 is 6810502316.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 1164869 + ... + 1216371.

It is an arithmetic number, because the mean of its divisors is an integer number (2730999600).

Almost surely, 2^61320501860 is an apocalyptic number.

It is an amenable number.

61320501860 is an abundant number, since it is smaller than the sum of its proper divisors (69767478940).

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

61320501860 is a wasteful number, since it uses less digits than its factorization.

61320501860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52580 (or 52578 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The spelling of 61320501860 in words is "sixty-one billion, three hundred twenty million, five hundred one thousand, eight hundred sixty".