61683518500 has 24 divisors (see below), whose sum is σ = 134716805496. Its totient is φ = 24673407200.

The previous prime is 61683518497. The next prime is 61683518503. The reversal of 61683518500 is 581538616.

It is an interprime number because it is at equal distance from previous prime (61683518497) and next prime (61683518503).

It can be written as a sum of positive squares in 4 ways, for example, as 14947996644 + 46735521856 = 122262^2 + 216184^2 .

It is not an unprimeable number, because it can be changed into a prime (61683518503) 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, 61683019 + ... + 61684018.

It is an arithmetic number, because the mean of its divisors is an integer number (5613200229).

Almost surely, 2^61683518500 is an apocalyptic number.

It is an amenable number.

61683518500 is an abundant number, since it is smaller than the sum of its proper divisors (73033286996).

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

61683518500 is a wasteful number, since it uses less digits than its factorization.

61683518500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123367056 (or 123367044 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The spelling of 61683518500 in words is "sixty-one billion, six hundred eighty-three million, five hundred eighteen thousand, five hundred".