461561690 has 16 divisors (see below), whose sum is σ = 831472128. Its totient is φ = 184477776.

The previous prime is 461561689. The next prime is 461561693. The reversal of 461561690 is 96165164.

It is a super-2 number, since 2×461561690² = 426078387351312200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (461561693) 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 7 ways as a sum of consecutive naturals, for example, 4682 + ... + 30741.

It is an arithmetic number, because the mean of its divisors is an integer number (51967008).

Almost surely, 2^461561690 is an apocalyptic number.

461561690 is a deficient number, since it is larger than the sum of its proper divisors (369910438).

461561690 is a wasteful number, since it uses less digits than its factorization.

461561690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36733.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 461561690 is about 21483.9868274024. The cubic root of 461561690 is about 772.8168542009.

The spelling of 461561690 in words is "four hundred sixty-one million, five hundred sixty-one thousand, six hundred ninety".