64908649020 has 48 divisors (see below), whose sum is σ = 181788677280. Its totient is φ = 17304738816.

The previous prime is 64908648971. The next prime is 64908649031. The reversal of 64908649020 is 2094680946.

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, 118936 + ... + 379424.

It is an arithmetic number, because the mean of its divisors is an integer number (3787264110).

Almost surely, 2^64908649020 is an apocalyptic number.

64908649020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64908649020 is an abundant number, since it is smaller than the sum of its proper divisors (116880028260).

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

64908649020 is a wasteful number, since it uses less digits than its factorization.

64908649020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264654 (or 264652 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The spelling of 64908649020 in words is "sixty-four billion, nine hundred eight million, six hundred forty-nine thousand, twenty".