72427444442 has 8 divisors (see below), whose sum is σ = 108643362996. Its totient is φ = 36212990112.

The previous prime is 72427444379. The next prime is 72427444471. The reversal of 72427444442 is 24444472427.

It can be written as a sum of positive squares in 2 ways, for example, as 70888530001 + 1538914441 = 266249^2 + 39229^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 72427444393 and 72427444402.

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, 232673 + ... + 446084.

Almost surely, 2^72427444442 is an apocalyptic number.

72427444442 is a deficient number, since it is larger than the sum of its proper divisors (36215918554).

72427444442 is a wasteful number, since it uses less digits than its factorization.

72427444442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 732112.

The product of its digits is 1605632, while the sum is 44.

The spelling of 72427444442 in words is "seventy-two billion, four hundred twenty-seven million, four hundred forty-four thousand, four hundred forty-two".