1640530968 has 32 divisors (see below), whose sum is σ = 4102533360. Its totient is φ = 546682880.

The previous prime is 1640530963. The next prime is 1640530993. The reversal of 1640530968 is 8690350461.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640530961) 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, 96208 + ... + 111968.

Almost surely, 2^1640530968 is an apocalyptic number.

It is an amenable number.

1640530968 is an abundant number, since it is smaller than the sum of its proper divisors (2462002392).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1640530968 is a wasteful number, since it uses less digits than its factorization.

1640530968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20107 (or 20103 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 1640530968 is about 40503.4685922082. The cubic root of 1640530968 is about 1179.4009618639.

The spelling of 1640530968 in words is "one billion, six hundred forty million, five hundred thirty thousand, nine hundred sixty-eight".