64705146880 has 156 divisors (see below), whose sum is σ = 170678946816. Its totient is φ = 23528243200.

The previous prime is 64705146839. The next prime is 64705146899. The reversal of 64705146880 is 8864150746.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2465025 + ... + 2491135.

Almost surely, 2^64705146880 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 64705146880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85339473408).

64705146880 is an abundant number, since it is smaller than the sum of its proper divisors (105973799936).

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

64705146880 is a wasteful number, since it uses less digits than its factorization.

64705146880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26162 (or 26129 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 64705146880 in words is "sixty-four billion, seven hundred five million, one hundred forty-six thousand, eight hundred eighty".