461978649 has 24 divisors (see below), whose sum is σ = 737193600. Its totient is φ = 276438240.

The previous prime is 461978609. The next prime is 461978663. The reversal of 461978649 is 946879164.

It is not a de Polignac number, because 461978649 - 2⁸ = 461978393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 461978595 and 461978604.

It is not an unprimeable number, because it can be changed into a prime (461978609) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21714 + ... + 37355.

It is an arithmetic number, because the mean of its divisors is an integer number (30716400).

Almost surely, 2^461978649 is an apocalyptic number.

It is an amenable number.

461978649 is a deficient number, since it is larger than the sum of its proper divisors (275214951).

461978649 is a wasteful number, since it uses less digits than its factorization.

461978649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59165 (or 59162 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 461978649 is about 21493.6885852568. The cubic root of 461978649 is about 773.0494962412.

The spelling of 461978649 in words is "four hundred sixty-one million, nine hundred seventy-eight thousand, six hundred forty-nine".