72890168445 has 24 divisors (see below), whose sum is σ = 132992589600. Its totient is φ = 36828716256.

The previous prime is 72890168443. The next prime is 72890168447. The reversal of 72890168445 is 54486109827.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (72890168443) and next prime (72890168447).

It is not a de Polignac number, because 72890168445 - 2¹ = 72890168443 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72890168391 and 72890168400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72890168443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 42624975 + ... + 42626684.

It is an arithmetic number, because the mean of its divisors is an integer number (5541357900).

Almost surely, 2^72890168445 is an apocalyptic number.

It is an amenable number.

72890168445 is a deficient number, since it is larger than the sum of its proper divisors (60102421155).

72890168445 is a wasteful number, since it uses less digits than its factorization.

72890168445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85251689 (or 85251686 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The spelling of 72890168445 in words is "seventy-two billion, eight hundred ninety million, one hundred sixty-eight thousand, four hundred forty-five".