1640930692 has 6 divisors (see below), whose sum is σ = 2871628718. Its totient is φ = 820465344.

The previous prime is 1640930677. The next prime is 1640930761. The reversal of 1640930692 is 2960390461.

It can be written as a sum of positive squares in only one way, i.e., 1598080576 + 42850116 = 39976^2 + 6546^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205116333 + ... + 205116340.

Almost surely, 2^1640930692 is an apocalyptic number.

It is an amenable number.

1640930692 is a deficient number, since it is larger than the sum of its proper divisors (1230698026).

1640930692 is a wasteful number, since it uses less digits than its factorization.

1640930692 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410232677 (or 410232675 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 1640930692 is about 40508.4027332602. The cubic root of 1640930692 is about 1179.4967431678.

The spelling of 1640930692 in words is "one billion, six hundred forty million, nine hundred thirty thousand, six hundred ninety-two".