640269140127 has 8 divisors (see below), whose sum is σ = 859421665200. Its totient is φ = 423981354240.

The previous prime is 640269140087. The next prime is 640269140191. The reversal of 640269140127 is 721041962046.

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

It is not a de Polignac number, because 640269140127 - 2¹⁶ = 640269074591 is a prime.

It is a super-2 number, since 2×640269140127² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640269140327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716184274 + ... + 716185167.

It is an arithmetic number, because the mean of its divisors is an integer number (107427708150).

Almost surely, 2^640269140127 is an apocalyptic number.

640269140127 is a deficient number, since it is larger than the sum of its proper divisors (219152525073).

640269140127 is a wasteful number, since it uses less digits than its factorization.

640269140127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432369593.

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 640269140127 in words is "six hundred forty billion, two hundred sixty-nine million, one hundred forty thousand, one hundred twenty-seven".