945473617821 has 16 divisors (see below), whose sum is σ = 1327999024640. Its totient is φ = 596682903600.

The previous prime is 945473617813. The next prime is 945473617883. The reversal of 945473617821 is 128716374549.

It is not a de Polignac number, because 945473617821 - 2³ = 945473617813 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945473617801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6290755 + ... + 6439296.

It is an arithmetic number, because the mean of its divisors is an integer number (82999939040).

Almost surely, 2^945473617821 is an apocalyptic number.

It is an amenable number.

945473617821 is a deficient number, since it is larger than the sum of its proper divisors (382525406819).

945473617821 is a wasteful number, since it uses less digits than its factorization.

945473617821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12731376.

The product of its digits is 10160640, while the sum is 57.

The spelling of 945473617821 in words is "nine hundred forty-five billion, four hundred seventy-three million, six hundred seventeen thousand, eight hundred twenty-one".