1640453463 has 12 divisors (see below), whose sum is σ = 2584957128. Its totient is φ = 994214160.

The previous prime is 1640453461. The next prime is 1640453473. The reversal of 1640453463 is 3643540461.

1640453463 is a `hidden beast` number, since 1 + 64 + 0 + 4 + 534 + 63 = 666.

It is not a de Polignac number, because 1640453463 - 2¹ = 1640453461 is a prime.

It is a hoax number, since the sum of its digits (36) 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 (1640453461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8285020 + ... + 8285217.

It is an arithmetic number, because the mean of its divisors is an integer number (215413094).

Almost surely, 2^1640453463 is an apocalyptic number.

1640453463 is a deficient number, since it is larger than the sum of its proper divisors (944503665).

1640453463 is a wasteful number, since it uses less digits than its factorization.

1640453463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16570254 (or 16570251 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 1640453463 is about 40502.5118109976. The cubic root of 1640453463 is about 1179.3823884237.

The spelling of 1640453463 in words is "one billion, six hundred forty million, four hundred fifty-three thousand, four hundred sixty-three".