65840348400 has 60 divisors (see below), whose sum is σ = 210908586552. Its totient is φ = 17557425920.

The previous prime is 65840348351. The next prime is 65840348429. The reversal of 65840348400 is 484304856.

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27432279 + ... + 27434678.

Almost surely, 2^65840348400 is an apocalyptic number.

65840348400 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65840348400 is an abundant number, since it is smaller than the sum of its proper divisors (145068238152).

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

65840348400 is a wasteful number, since it uses less digits than its factorization.

65840348400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54866978 (or 54866967 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 42.

The spelling of 65840348400 in words is "sixty-five billion, eight hundred forty million, three hundred forty-eight thousand, four hundred".