72012443631 has 8 divisors (see below), whose sum is σ = 96056326704. Its totient is φ = 47988428160.

The previous prime is 72012443627. The next prime is 72012443639. The reversal of 72012443631 is 13634421027.

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

It is not a de Polignac number, because 72012443631 - 2² = 72012443627 is a prime.

It is a super-2 number, since 2×72012443631² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72012443592 and 72012443601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72012443639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4958440 + ... + 4972941.

It is an arithmetic number, because the mean of its divisors is an integer number (12007040838).

Almost surely, 2^72012443631 is an apocalyptic number.

72012443631 is a deficient number, since it is larger than the sum of its proper divisors (24043883073).

72012443631 is a wasteful number, since it uses less digits than its factorization.

72012443631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933801.

The product of its (nonzero) digits is 24192, while the sum is 33.

Adding to 72012443631 its reverse (13634421027), we get a palindrome (85646864658).

The spelling of 72012443631 in words is "seventy-two billion, twelve million, four hundred forty-three thousand, six hundred thirty-one".