61500610020 has 48 divisors (see below), whose sum is σ = 173781558720. Its totient is φ = 16249700736.

The previous prime is 61500610019. The next prime is 61500610021. The reversal of 61500610020 is 2001600516.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (61500610019) and next prime (61500610021).

It is not an unprimeable number, because it can be changed into a prime (61500610021) 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 15 ways as a sum of consecutive naturals, for example, 4695342 + ... + 4708421.

It is an arithmetic number, because the mean of its divisors is an integer number (3620449140).

Almost surely, 2^61500610020 is an apocalyptic number.

61500610020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61500610020 is an abundant number, since it is smaller than the sum of its proper divisors (112280948700).

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

61500610020 is a wasteful number, since it uses less digits than its factorization.

61500610020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9403884 (or 9403882 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The spelling of 61500610020 in words is "sixty-one billion, five hundred million, six hundred ten thousand, twenty".