640127613144 has 32 divisors (see below), whose sum is σ = 1602990720000. Its totient is φ = 213019646112.

The previous prime is 640127613131. The next prime is 640127613157. The reversal of 640127613144 is 441316721046.

It is an interprime number because it is at equal distance from previous prime (640127613131) and next prime (640127613157).

It is a super-2 number, since 2×640127613144² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22249384 + ... + 22278135.

It is an arithmetic number, because the mean of its divisors is an integer number (50093460000).

Almost surely, 2^640127613144 is an apocalyptic number.

It is an amenable number.

640127613144 is an abundant number, since it is smaller than the sum of its proper divisors (962863106856).

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

640127613144 is a wasteful number, since it uses less digits than its factorization.

640127613144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44528127 (or 44528123 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 640127613144 in words is "six hundred forty billion, one hundred twenty-seven million, six hundred thirteen thousand, one hundred forty-four".