1461608638 has 16 divisors (see below), whose sum is σ = 2506994784. Its totient is φ = 626058720.

The previous prime is 1461608539. The next prime is 1461608663. The reversal of 1461608638 is 8368061641.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1461608594 and 1461608603.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1533 + ... + 54088.

It is an arithmetic number, because the mean of its divisors is an integer number (156687174).

Almost surely, 2^1461608638 is an apocalyptic number.

1461608638 is a deficient number, since it is larger than the sum of its proper divisors (1045386146).

1461608638 is a wasteful number, since it uses less digits than its factorization.

1461608638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57507.

The product of its (nonzero) digits is 165888, while the sum is 43.

The square root of 1461608638 is about 38230.9905443215. The cubic root of 1461608638 is about 1134.8636883398.

The spelling of 1461608638 in words is "one billion, four hundred sixty-one million, six hundred eight thousand, six hundred thirty-eight".