640711128414 has 32 divisors (see below), whose sum is σ = 1464513716736. Its totient is φ = 183056430240.

The previous prime is 640711128391. The next prime is 640711128437. The reversal of 640711128414 is 414821117046.

It is an interprime number because it is at equal distance from previous prime (640711128391) and next prime (640711128437).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263599 + ... + 2530869.

It is an arithmetic number, because the mean of its divisors is an integer number (45766053648).

Almost surely, 2^640711128414 is an apocalyptic number.

640711128414 is an abundant number, since it is smaller than the sum of its proper divisors (823802588322).

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

640711128414 is a wasteful number, since it uses less digits than its factorization.

640711128414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324360.

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 640711128414 in words is "six hundred forty billion, seven hundred eleven million, one hundred twenty-eight thousand, four hundred fourteen".