65434238320 has 80 divisors (see below), whose sum is σ = 174700068480. Its totient is φ = 22541932800.

The previous prime is 65434238281. The next prime is 65434238371. The reversal of 65434238320 is 2383243456.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 1940046 + ... + 1973485.

It is an arithmetic number, because the mean of its divisors is an integer number (2183750856).

Almost surely, 2^65434238320 is an apocalyptic number.

It is an amenable number.

65434238320 is an abundant number, since it is smaller than the sum of its proper divisors (109265830160).

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

65434238320 is a wasteful number, since it uses less digits than its factorization.

65434238320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3913574 (or 3913568 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 40.

The spelling of 65434238320 in words is "sixty-five billion, four hundred thirty-four million, two hundred thirty-eight thousand, three hundred twenty".