5421731642 has 8 divisors (see below), whose sum is σ = 8139112500. Its totient is φ = 2708694144.

The previous prime is 5421731641. The next prime is 5421731687. The reversal of 5421731642 is 2461371245.

It can be written as a sum of positive squares in 2 ways, for example, as 5406513841 + 15217801 = 73529^2 + 3901^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (5421731641) 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, 1082717 + ... + 1087712.

Almost surely, 2^5421731642 is an apocalyptic number.

5421731642 is a deficient number, since it is larger than the sum of its proper divisors (2717380858).

5421731642 is a wasteful number, since it uses less digits than its factorization.

5421731642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2171680.

The product of its digits is 40320, while the sum is 35.

The square root of 5421731642 is about 73632.4089107507. The cubic root of 5421731642 is about 1756.7609635002.

The spelling of 5421731642 in words is "five billion, four hundred twenty-one million, seven hundred thirty-one thousand, six hundred forty-two".