640380636540484 has 24 divisors (see below), whose sum is σ = 1280847098568128. Its totient is φ = 274430453055840.

The previous prime is 640380636540433. The next prime is 640380636540503. The reversal of 640380636540484 is 484045636083046.

It is a super-3 number, since 3×640380636540484³ (a number of 45 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 765873687 + ... + 766709374.

Almost surely, 2^{640380636540484} is an apocalyptic number.

It is an amenable number.

640380636540484 is an abundant number, since it is smaller than the sum of its proper divisors (640466462027644).

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

640380636540484 is a wasteful number, since it uses less digits than its factorization.

640380636540484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532597995 (or 1532597993 counting only the distinct ones).

The product of its (nonzero) digits is 159252480, while the sum is 61.

The spelling of 640380636540484 in words is "six hundred forty trillion, three hundred eighty billion, six hundred thirty-six million, five hundred forty thousand, four hundred eighty-four".