640233631512422 has 8 divisors (see below), whose sum is σ = 960424474166976. Its totient is φ = 320092140123432.

The previous prime is 640233631512367. The next prime is 640233631512437. The reversal of 640233631512422 is 224215136332046.

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

It is a super-2 number, since 2×640233631512422² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12337783958 + ... + 12337835849.

It is an arithmetic number, because the mean of its divisors is an integer number (120053059270872).

Almost surely, 2^{640233631512422} is an apocalyptic number.

640233631512422 is a deficient number, since it is larger than the sum of its proper divisors (320190842654554).

640233631512422 is a wasteful number, since it uses less digits than its factorization.

640233631512422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24675632782.

The product of its (nonzero) digits is 1244160, while the sum is 44.

Adding to 640233631512422 its reverse (224215136332046), we get a palindrome (864448767844468).

The spelling of 640233631512422 in words is "six hundred forty trillion, two hundred thirty-three billion, six hundred thirty-one million, five hundred twelve thousand, four hundred twenty-two".