861546469 has 12 divisors (see below), whose sum is σ = 1054956000. Its totient is φ = 699600888.

The previous prime is 861546467. The next prime is 861546473. The reversal of 861546469 is 964645168.

It is not a de Polignac number, because 861546469 - 2¹ = 861546467 is a prime.

It is a super-2 number, since 2×861546469² = 1484524636492735922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861546467) 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 11 ways as a sum of consecutive naturals, for example, 461769 + ... + 463630.

It is an arithmetic number, because the mean of its divisors is an integer number (87913000).

Almost surely, 2^861546469 is an apocalyptic number.

It is an amenable number.

861546469 is a deficient number, since it is larger than the sum of its proper divisors (193409531).

861546469 is a wasteful number, since it uses less digits than its factorization.

861546469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925432 (or 925425 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 861546469 is about 29352.1118320301. Note that the first 3 decimals coincide. The cubic root of 861546469 is about 951.5382167846.

The spelling of 861546469 in words is "eight hundred sixty-one million, five hundred forty-six thousand, four hundred sixty-nine".