72431426642 has 8 divisors (see below), whose sum is σ = 111297070332. Its totient is φ = 35332403200.

The previous prime is 72431426597. The next prime is 72431426659. The reversal of 72431426642 is 24662413427.

It can be written as a sum of positive squares in 2 ways, for example, as 72253977601 + 177449041 = 268801^2 + 13321^2 .

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

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a self number, because there is not a number n which added to its sum of digits gives 72431426642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441654959 + ... + 441655122.

Almost surely, 2^72431426642 is an apocalyptic number.

72431426642 is a deficient number, since it is larger than the sum of its proper divisors (38865643690).

72431426642 is a wasteful number, since it uses less digits than its factorization.

72431426642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883310124.

The product of its digits is 387072, while the sum is 41.

The spelling of 72431426642 in words is "seventy-two billion, four hundred thirty-one million, four hundred twenty-six thousand, six hundred forty-two".