640151367277726 has 16 divisors (see below), whose sum is σ = 982817917804800. Its totient is φ = 312549334149528.

The previous prime is 640151367277687. The next prime is 640151367277727. The reversal of 640151367277726 is 627772763151046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640151367277727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 984541446 + ... + 985191433.

It is an arithmetic number, because the mean of its divisors is an integer number (61426119862800).

Almost surely, 2^{640151367277726} is an apocalyptic number.

640151367277726 is a deficient number, since it is larger than the sum of its proper divisors (342666550527074).

640151367277726 is a wasteful number, since it uses less digits than its factorization.

640151367277726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1969736703.

The product of its (nonzero) digits is 124467840, while the sum is 64.

The spelling of 640151367277726 in words is "six hundred forty trillion, one hundred fifty-one billion, three hundred sixty-seven million, two hundred seventy-seven thousand, seven hundred twenty-six".