72646322152 has 16 divisors (see below), whose sum is σ = 136236564000. Its totient is φ = 36316571760.

The previous prime is 72646322137. The next prime is 72646322159. The reversal of 72646322152 is 25122364627.

It is a happy number.

It is a super-3 number, since 3×72646322152³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (72646322159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776652 + ... + 865147.

It is an arithmetic number, because the mean of its divisors is an integer number (8514785250).

Almost surely, 2^72646322152 is an apocalyptic number.

It is an amenable number.

72646322152 is a deficient number, since it is larger than the sum of its proper divisors (63590241848).

72646322152 is a wasteful number, since it uses less digits than its factorization.

72646322152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1647336 (or 1647332 counting only the distinct ones).

The product of its digits is 241920, while the sum is 40.

Adding to 72646322152 its reverse (25122364627), we get a palindrome (97768686779).

The spelling of 72646322152 in words is "seventy-two billion, six hundred forty-six million, three hundred twenty-two thousand, one hundred fifty-two".