65211464064 has 64 divisors (see below), whose sum is σ = 173301410880. Its totient is φ = 21726681600.

The previous prime is 65211464053. The next prime is 65211464083. The reversal of 65211464064 is 46046411256.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 778459 + ... + 858149.

It is an arithmetic number, because the mean of its divisors is an integer number (2707834545).

Almost surely, 2^65211464064 is an apocalyptic number.

65211464064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

65211464064 is an abundant number, since it is smaller than the sum of its proper divisors (108089946816).

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

65211464064 is a wasteful number, since it uses less digits than its factorization.

65211464064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81839 (or 81827 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 65211464064 in words is "sixty-five billion, two hundred eleven million, four hundred sixty-four thousand, sixty-four".