1640077168 has 40 divisors (see below), whose sum is σ = 3216691440. Its totient is φ = 810009600.

The previous prime is 1640077157. The next prime is 1640077213. The reversal of 1640077168 is 8617700461.

It is a self number, because there is not a number n which added to its sum of digits gives 1640077168.

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, 685318 + ... + 687706.

It is an arithmetic number, because the mean of its divisors is an integer number (80417286).

Almost surely, 2^1640077168 is an apocalyptic number.

It is an amenable number.

1640077168 is a deficient number, since it is larger than the sum of its proper divisors (1576614272).

1640077168 is a wasteful number, since it uses less digits than its factorization.

1640077168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2905 (or 2899 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 1640077168 is about 40497.8662153946. The cubic root of 1640077168 is about 1179.2922040848.

The spelling of 1640077168 in words is "one billion, six hundred forty million, seventy-seven thousand, one hundred sixty-eight".