640371126 has 16 divisors (see below), whose sum is σ = 1299858624. Its totient is φ = 210270984.

The previous prime is 640371101. The next prime is 640371143. The reversal of 640371126 is 621173046.

640371126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 640371093 and 640371102.

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, 796080 + ... + 796883.

It is an arithmetic number, because the mean of its divisors is an integer number (81241164).

Almost surely, 2^640371126 is an apocalyptic number.

640371126 is an abundant number, since it is smaller than the sum of its proper divisors (659487498).

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

640371126 is a wasteful number, since it uses less digits than its factorization.

640371126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593035.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 640371126 is about 25305.5552399073. Note that the first 3 decimals coincide. The cubic root of 640371126 is about 861.9404202266.

The spelling of 640371126 in words is "six hundred forty million, three hundred seventy-one thousand, one hundred twenty-six".