61501334320 has 20 divisors (see below), whose sum is σ = 142990602480. Its totient is φ = 24600533696.

The previous prime is 61501334309. The next prime is 61501334329. The reversal of 61501334320 is 2343310516.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (61501334329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 384383260 + ... + 384383419.

It is an arithmetic number, because the mean of its divisors is an integer number (7149530124).

Almost surely, 2^61501334320 is an apocalyptic number.

It is an amenable number.

61501334320 is an abundant number, since it is smaller than the sum of its proper divisors (81489268160).

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

61501334320 is a wasteful number, since it uses less digits than its factorization.

61501334320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768766692 (or 768766686 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

Adding to 61501334320 its reverse (2343310516), we get a palindrome (63844644836).

The spelling of 61501334320 in words is "sixty-one billion, five hundred one million, three hundred thirty-four thousand, three hundred twenty".