72399889551 has 16 divisors (see below), whose sum is σ = 106015708800. Its totient is φ = 43584229920.

The previous prime is 72399889543. The next prime is 72399889643. The reversal of 72399889551 is 15598899327.

It is not a de Polignac number, because 72399889551 - 2³ = 72399889543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72399888551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7357285 + ... + 7367118.

It is an arithmetic number, because the mean of its divisors is an integer number (6625981800).

Almost surely, 2^72399889551 is an apocalyptic number.

72399889551 is a deficient number, since it is larger than the sum of its proper divisors (33615819249).

72399889551 is a wasteful number, since it uses less digits than its factorization.

72399889551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14724566.

The product of its digits is 48988800, while the sum is 66.

The spelling of 72399889551 in words is "seventy-two billion, three hundred ninety-nine million, eight hundred eighty-nine thousand, five hundred fifty-one".