461465781 has 36 divisors (see below), whose sum is σ = 726358752. Its totient is φ = 259839216.

The previous prime is 461465773. The next prime is 461465821. The reversal of 461465781 is 187564164.

It is not a de Polignac number, because 461465781 - 2³ = 461465773 is a prime.

It is a super-2 number, since 2×461465781² = 425901334067879922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461465581) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 917176 + ... + 917678.

It is an arithmetic number, because the mean of its divisors is an integer number (20176632).

Almost surely, 2^461465781 is an apocalyptic number.

It is an amenable number.

461465781 is a deficient number, since it is larger than the sum of its proper divisors (264892971).

461465781 is an equidigital number, since it uses as much as digits as its factorization.

461465781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 592 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 461465781 is about 21481.7546071079. The cubic root of 461465781 is about 772.7633220095.

The spelling of 461465781 in words is "four hundred sixty-one million, four hundred sixty-five thousand, seven hundred eighty-one".