64498194280 has 96 divisors (see below), whose sum is σ = 161390518200. Its totient is φ = 23170987008.

The previous prime is 64498194269. The next prime is 64498194347. The reversal of 64498194280 is 8249189446.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 5560164 + 64492634116 = 2358^2 + 253954^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121186 + ... + 379054.

Almost surely, 2^64498194280 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 64498194280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80695259100).

64498194280 is an abundant number, since it is smaller than the sum of its proper divisors (96892323920).

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

64498194280 is a wasteful number, since it uses less digits than its factorization.

64498194280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257943 (or 257926 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 64498194280 in words is "sixty-four billion, four hundred ninety-eight million, one hundred ninety-four thousand, two hundred eighty".