65203157840 has 40 divisors (see below), whose sum is σ = 152231685120. Its totient is φ = 25972128896.

The previous prime is 65203157819. The next prime is 65203157867. The reversal of 65203157840 is 4875130256.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685984 + ... + 1724223.

It is an arithmetic number, because the mean of its divisors is an integer number (3805792128).

Almost surely, 2^65203157840 is an apocalyptic number.

It is an amenable number.

65203157840 is an abundant number, since it is smaller than the sum of its proper divisors (87028527280).

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

65203157840 is a wasteful number, since it uses less digits than its factorization.

65203157840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410459 (or 3410453 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 65203157840 in words is "sixty-five billion, two hundred three million, one hundred fifty-seven thousand, eight hundred forty".