72888361645 has 32 divisors (see below), whose sum is σ = 101353472640. Its totient is φ = 49731901440.

The previous prime is 72888361643. The next prime is 72888361657. The reversal of 72888361645 is 54616388827.

It is a happy number.

It is not a de Polignac number, because 72888361645 - 2¹ = 72888361643 is a prime.

It is a super-3 number, since 3×72888361645³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72888361645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72888361643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168126 + ... + 417184.

It is an arithmetic number, because the mean of its divisors is an integer number (3167296020).

Almost surely, 2^72888361645 is an apocalyptic number.

It is an amenable number.

72888361645 is a deficient number, since it is larger than the sum of its proper divisors (28465110995).

72888361645 is a wasteful number, since it uses less digits than its factorization.

72888361645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249405.

The product of its digits is 15482880, while the sum is 58.

The spelling of 72888361645 in words is "seventy-two billion, eight hundred eighty-eight million, three hundred sixty-one thousand, six hundred forty-five".