1640463462 has 32 divisors (see below), whose sum is σ = 3976882560. Its totient is φ = 497109960.

The previous prime is 1640463437. The next prime is 1640463469. The reversal of 1640463462 is 2643640461.

1640463462 is a `hidden beast` number, since 1 + 640 + 4 + 6 + 3 + 4 + 6 + 2 = 666.

It is a super-2 number, since 2×1640463462² = 5382240740314050888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640463469) 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 15 ways as a sum of consecutive naturals, for example, 1380268 + ... + 1381455.

It is an arithmetic number, because the mean of its divisors is an integer number (124277580).

Almost surely, 2^1640463462 is an apocalyptic number.

1640463462 is an abundant number, since it is smaller than the sum of its proper divisors (2336419098).

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

1640463462 is a wasteful number, since it uses less digits than its factorization.

1640463462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761745 (or 2761739 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 1640463462 is about 40502.6352475984. The cubic root of 1640463462 is about 1179.3847846353.

The spelling of 1640463462 in words is "one billion, six hundred forty million, four hundred sixty-three thousand, four hundred sixty-two".