1640167696 has 20 divisors (see below), whose sum is σ = 3198070732. Its totient is φ = 814859136.

The previous prime is 1640167693. The next prime is 1640167741. The reversal of 1640167696 is 6967610461.

It can be written as a sum of positive squares in 2 ways, for example, as 1028100096 + 612067600 = 32064^2 + 24740^2 .

It is not an unprimeable number, because it can be changed into a prime (1640167693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 323955 + ... + 328978.

Almost surely, 2^1640167696 is an apocalyptic number.

1640167696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1640167696 is a deficient number, since it is larger than the sum of its proper divisors (1557903036).

1640167696 is a wasteful number, since it uses less digits than its factorization.

1640167696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653098 (or 653092 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1640167696 is about 40498.9838884879. The cubic root of 1640167696 is about 1179.3139016411.

The spelling of 1640167696 in words is "one billion, six hundred forty million, one hundred sixty-seven thousand, six hundred ninety-six".