210640490064 has 80 divisors (see below), whose sum is σ = 618677118400. Its totient is φ = 68580618624.

The previous prime is 210640490059. The next prime is 210640490087. The reversal of 210640490064 is 460094046012.

210640490064 is a `hidden beast` number, since 2 + 1 + 0 + 640 + 4 + 9 + 0 + 0 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 5651119 + ... + 5688270.

It is an arithmetic number, because the mean of its divisors is an integer number (7733463980).

Almost surely, 2^210640490064 is an apocalyptic number.

210640490064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

210640490064 is an abundant number, since it is smaller than the sum of its proper divisors (408036628336).

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

210640490064 is a wasteful number, since it uses less digits than its factorization.

210640490064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11339449 (or 11339437 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The spelling of 210640490064 in words is "two hundred ten billion, six hundred forty million, four hundred ninety thousand, sixty-four".