1664025535 has 16 divisors (see below), whose sum is σ = 2130445152. Its totient is φ = 1243340800.

The previous prime is 1664025521. The next prime is 1664025541. The reversal of 1664025535 is 5355204661.

It is not a de Polignac number, because 1664025535 - 2¹³ = 1664017343 is a prime.

It is a super-2 number, since 2×1664025535² = 5537961962264072450, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1664025494 and 1664025503.

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, 63586 + ... + 85855.

It is an arithmetic number, because the mean of its divisors is an integer number (133152822).

Almost surely, 2^1664025535 is an apocalyptic number.

1664025535 is a deficient number, since it is larger than the sum of its proper divisors (466419617).

1664025535 is a wasteful number, since it uses less digits than its factorization.

1664025535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149594.

The product of its (nonzero) digits is 108000, while the sum is 37.

The square root of 1664025535 is about 40792.4690966360. The cubic root of 1664025535 is about 1185.0044888173.

The spelling of 1664025535 in words is "one billion, six hundred sixty-four million, twenty-five thousand, five hundred thirty-five".