474921689821 has 4 divisors (see below), whose sum is σ = 475714548000. Its totient is φ = 474128831644.

The previous prime is 474921689819. The next prime is 474921689831. The reversal of 474921689821 is 128986129474.

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 a cyclic number.

It is not a de Polignac number, because 474921689821 - 2¹ = 474921689819 is a prime.

It is a super-2 number, since 2×474921689821² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 474921689821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (474921689831) 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, 396428191 + ... + 396429388.

It is an arithmetic number, because the mean of its divisors is an integer number (118928637000).

Almost surely, 2^474921689821 is an apocalyptic number.

It is an amenable number.

474921689821 is a deficient number, since it is larger than the sum of its proper divisors (792858179).

474921689821 is an equidigital number, since it uses as much as digits as its factorization.

474921689821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792858178.

The product of its digits is 13934592, while the sum is 61.

The spelling of 474921689821 in words is "four hundred seventy-four billion, nine hundred twenty-one million, six hundred eighty-nine thousand, eight hundred twenty-one".