640222150887 has 24 divisors (see below), whose sum is σ = 1008869376528. Its totient is φ = 388000166400.

The previous prime is 640222150873. The next prime is 640222150889. The reversal of 640222150887 is 788051222046.

640222150887 is a `hidden beast` number, since 6 + 40 + 2 + 2 + 21 + 508 + 87 = 666.

It is not a de Polignac number, because 640222150887 - 2⁷ = 640222150759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640222150889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3344253 + ... + 3530505.

It is an arithmetic number, because the mean of its divisors is an integer number (42036224022).

Almost surely, 2^640222150887 is an apocalyptic number.

640222150887 is a deficient number, since it is larger than the sum of its proper divisors (368647225641).

640222150887 is a wasteful number, since it uses less digits than its factorization.

640222150887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220991 (or 220988 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 640222150887 in words is "six hundred forty billion, two hundred twenty-two million, one hundred fifty thousand, eight hundred eighty-seven".