1640697022 has 16 divisors (see below), whose sum is σ = 2518704720. Its totient is φ = 801351232.

The previous prime is 1640697017. The next prime is 1640697029. The reversal of 1640697022 is 2207960461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640697029) 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, 40753 + ... + 70300.

It is an arithmetic number, because the mean of its divisors is an integer number (157419045).

Almost surely, 2^1640697022 is an apocalyptic number.

1640697022 is a deficient number, since it is larger than the sum of its proper divisors (878007698).

1640697022 is a wasteful number, since it uses less digits than its factorization.

1640697022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111227.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1640697022 is about 40505.5184141618. The cubic root of 1640697022 is about 1179.4407533793.

The spelling of 1640697022 in words is "one billion, six hundred forty million, six hundred ninety-seven thousand, twenty-two".