72031445442 has 72 divisors (see below), whose sum is σ = 175535632272. Its totient is φ = 21320061840.

The previous prime is 72031445419. The next prime is 72031445459. The reversal of 72031445442 is 24454413027.

72031445442 is a `hidden beast` number, since 7 + 203 + 1 + 4 + 4 + 5 + 442 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 72031445397 and 72031445406.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 290908 + ... + 478215.

Almost surely, 2^72031445442 is an apocalyptic number.

72031445442 is an abundant number, since it is smaller than the sum of its proper divisors (103504186830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72031445442 is a wasteful number, since it uses less digits than its factorization.

72031445442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769196 (or 769182 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 36.

Adding to 72031445442 its reverse (24454413027), we get a palindrome (96485858469).

The spelling of 72031445442 in words is "seventy-two billion, thirty-one million, four hundred forty-five thousand, four hundred forty-two".