64809000312 has 128 divisors (see below), whose sum is σ = 196170854400. Its totient is φ = 17417852928.

The previous prime is 64809000301. The next prime is 64809000337. The reversal of 64809000312 is 21300090846.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6115114 + ... + 6125702.

It is an arithmetic number, because the mean of its divisors is an integer number (1532584800).

Almost surely, 2^64809000312 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 64809000312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98085427200).

64809000312 is an abundant number, since it is smaller than the sum of its proper divisors (131361854088).

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

64809000312 is a wasteful number, since it uses less digits than its factorization.

64809000312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12765 (or 12761 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The spelling of 64809000312 in words is "sixty-four billion, eight hundred nine million, three hundred twelve", and thus it is an aban number.