1461143646 has 24 divisors (see below), whose sum is σ = 3267935424. Its totient is φ = 471336480.

The previous prime is 1461143639. The next prime is 1461143687. The reversal of 1461143646 is 6463411641.

1461143646 is a `hidden beast` number, since 1 + 4 + 6 + 1 + 1 + 4 + 3 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1461143646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1308711 + ... + 1309826.

It is an arithmetic number, because the mean of its divisors is an integer number (136163976).

Almost surely, 2^1461143646 is an apocalyptic number.

1461143646 is an abundant number, since it is smaller than the sum of its proper divisors (1806791778).

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

1461143646 is a wasteful number, since it uses less digits than its factorization.

1461143646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618576 (or 2618573 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 1461143646 is about 38224.9087114672. The cubic root of 1461143646 is about 1134.7433281438.

The spelling of 1461143646 in words is "one billion, four hundred sixty-one million, one hundred forty-three thousand, six hundred forty-six".