61264466560 has 128 divisors (see below), whose sum is σ = 160291172160. Its totient is φ = 22206013440.

The previous prime is 61264466507. The next prime is 61264466579. The reversal of 61264466560 is 6566446216.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 61264466560.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189619 + ... + 2217421.

Almost surely, 2^61264466560 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 61264466560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80145586080).

61264466560 is an abundant number, since it is smaller than the sum of its proper divisors (99026705600).

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

61264466560 is a wasteful number, since it uses less digits than its factorization.

61264466560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28146 (or 28134 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 61264466560 in words is "sixty-one billion, two hundred sixty-four million, four hundred sixty-six thousand, five hundred sixty".