64498880540 has 12 divisors (see below), whose sum is σ = 135447649176. Its totient is φ = 25799552208.

The previous prime is 64498880539. The next prime is 64498880587. The reversal of 64498880540 is 4508889446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1612471994 + ... + 1612472033.

It is an arithmetic number, because the mean of its divisors is an integer number (11287304098).

Almost surely, 2^64498880540 is an apocalyptic number.

It is an amenable number.

64498880540 is an abundant number, since it is smaller than the sum of its proper divisors (70948768636).

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

64498880540 is a wasteful number, since it uses less digits than its factorization.

64498880540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224944036 (or 3224944034 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 64498880540 in words is "sixty-four billion, four hundred ninety-eight million, eight hundred eighty thousand, five hundred forty".