1664934534 has 32 divisors (see below), whose sum is σ = 3860720640. Its totient is φ = 530848296.

The previous prime is 1664934521. The next prime is 1664934541. The reversal of 1664934534 is 4354394661.

It is a self number, because there is not a number n which added to its sum of digits gives 1664934534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 669022 + ... + 671505.

It is an arithmetic number, because the mean of its divisors is an integer number (120647520).

Almost surely, 2^1664934534 is an apocalyptic number.

1664934534 is an abundant number, since it is smaller than the sum of its proper divisors (2195786106).

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

1664934534 is a wasteful number, since it uses less digits than its factorization.

1664934534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340561 (or 1340555 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 1664934534 is about 40803.6093256467. The cubic root of 1664934534 is about 1185.2202250530.

The spelling of 1664934534 in words is "one billion, six hundred sixty-four million, nine hundred thirty-four thousand, five hundred thirty-four".