61869464556032 has 160 divisors (see below), whose sum is σ = 143843003399040. Its totient is φ = 26035550945280.

The previous prime is 61869464556023. The next prime is 61869464556049. The reversal of 61869464556032 is 23065546496816.

It is a self number, because there is not a number n which added to its sum of digits gives 61869464556032.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 125900819 + ... + 126391277.

It is an arithmetic number, because the mean of its divisors is an integer number (899018771244).

Almost surely, 2^{61869464556032} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61869464556032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71921501699520).

61869464556032 is an abundant number, since it is smaller than the sum of its proper divisors (81973538843008).

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

61869464556032 is an equidigital number, since it uses as much as digits as its factorization.

61869464556032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491122 (or 491106 counting only the distinct ones).

The product of its (nonzero) digits is 223948800, while the sum is 65.

The spelling of 61869464556032 in words is "sixty-one trillion, eight hundred sixty-nine billion, four hundred sixty-four million, five hundred fifty-six thousand, thirty-two".