640223342521126 has 32 divisors (see below), whose sum is σ = 1198141892877888. Its totient is φ = 249805645608960.

The previous prime is 640223342521099. The next prime is 640223342521151. The reversal of 640223342521126 is 621125243322046.

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, 24093895435 + ... + 24093922006.

It is an arithmetic number, because the mean of its divisors is an integer number (37441934152434).

Almost surely, 2^{640223342521126} is an apocalyptic number.

640223342521126 is a deficient number, since it is larger than the sum of its proper divisors (557918550356762).

640223342521126 is a wasteful number, since it uses less digits than its factorization.

640223342521126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48187817536.

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 640223342521126 in words is "six hundred forty trillion, two hundred twenty-three billion, three hundred forty-two million, five hundred twenty-one thousand, one hundred twenty-six".