64980518370 has 64 divisors (see below), whose sum is σ = 161847054720. Its totient is φ = 16677093888.

The previous prime is 64980518279. The next prime is 64980518371. The reversal of 64980518370 is 7381508946.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64980518371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152997 + ... + 391623.

It is an arithmetic number, because the mean of its divisors is an integer number (2528860230).

Almost surely, 2^64980518370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64980518370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80923527360).

64980518370 is an abundant number, since it is smaller than the sum of its proper divisors (96866536350).

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

64980518370 is a wasteful number, since it uses less digits than its factorization.

64980518370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238979.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 64980518370 in words is "sixty-four billion, nine hundred eighty million, five hundred eighteen thousand, three hundred seventy".