640234583519 has 8 divisors (see below), whose sum is σ = 642120174720. Its totient is φ = 638349560856.

The previous prime is 640234583491. The next prime is 640234583557. The reversal of 640234583519 is 915385432046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640234583519 is a prime.

It is a super-2 number, since 2×640234583519² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640234580519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2168552 + ... + 2446034.

It is an arithmetic number, because the mean of its divisors is an integer number (80265021840).

Almost surely, 2^640234583519 is an apocalyptic number.

640234583519 is a deficient number, since it is larger than the sum of its proper divisors (1885591201).

640234583519 is a wasteful number, since it uses less digits than its factorization.

640234583519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284269.

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 640234583519 in words is "six hundred forty billion, two hundred thirty-four million, five hundred eighty-three thousand, five hundred nineteen".