1664492031 has 32 divisors (see below), whose sum is σ = 2527712000. Its totient is φ = 1081944864.

The previous prime is 1664491999. The next prime is 1664492059. The reversal of 1664492031 is 1302944661.

1664492031 is a `hidden beast` number, since 1 + 6 + 6 + 449 + 203 + 1 = 666.

It is not a de Polignac number, because 1664492031 - 2⁵ = 1664491999 is a prime.

It is a super-2 number, since 2×1664492031² = 5541067442525009922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664492231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 996465 + ... + 998133.

It is an arithmetic number, because the mean of its divisors is an integer number (78991000).

Almost surely, 2^1664492031 is an apocalyptic number.

1664492031 is a deficient number, since it is larger than the sum of its proper divisors (863219969).

1664492031 is a wasteful number, since it uses less digits than its factorization.

1664492031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580 (or 2574 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1664492031 is about 40798.1866141131. The cubic root of 1664492031 is about 1185.1152139219.

The spelling of 1664492031 in words is "one billion, six hundred sixty-four million, four hundred ninety-two thousand, thirty-one".