461477571861 has 4 divisors (see below), whose sum is σ = 615303429152. Its totient is φ = 307651714572.

The previous prime is 461477571833. The next prime is 461477571871. The reversal of 461477571861 is 168175774164.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 461477571861 - 2²¹ = 461475474709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461477571871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76912928641 + ... + 76912928646.

It is an arithmetic number, because the mean of its divisors is an integer number (153825857288).

Almost surely, 2^461477571861 is an apocalyptic number.

It is an amenable number.

461477571861 is a deficient number, since it is larger than the sum of its proper divisors (153825857291).

461477571861 is a wasteful number, since it uses less digits than its factorization.

461477571861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153825857290.

The product of its digits is 7902720, while the sum is 57.

The spelling of 461477571861 in words is "four hundred sixty-one billion, four hundred seventy-seven million, five hundred seventy-one thousand, eight hundred sixty-one".