1640025675686 has 16 divisors (see below), whose sum is σ = 2462547517440. Its totient is φ = 819176810760.

The previous prime is 1640025675683. The next prime is 1640025675689. The reversal of 1640025675686 is 6865765200461.

It is an interprime number because it is at equal distance from previous prime (1640025675683) and next prime (1640025675689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640025675683) 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, 10994381 + ... + 11142551.

It is an arithmetic number, because the mean of its divisors is an integer number (153909219840).

Almost surely, 2^{1640025675686} is an apocalyptic number.

1640025675686 is a deficient number, since it is larger than the sum of its proper divisors (822521841754).

1640025675686 is a wasteful number, since it uses less digits than its factorization.

1640025675686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153779.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 1640025675686 in words is "one trillion, six hundred forty billion, twenty-five million, six hundred seventy-five thousand, six hundred eighty-six".