72345144550 has 24 divisors (see below), whose sum is σ = 153785108016. Its totient is φ = 24804049440.

The previous prime is 72345144527. The next prime is 72345144593. The reversal of 72345144550 is 5544154327.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 103349857 + ... + 103350556.

It is an arithmetic number, because the mean of its divisors is an integer number (6407712834).

Almost surely, 2^72345144550 is an apocalyptic number.

72345144550 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

72345144550 is an abundant number, since it is smaller than the sum of its proper divisors (81439963466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72345144550 is a wasteful number, since it uses less digits than its factorization.

72345144550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206700432 (or 206700427 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 40.

Adding to 72345144550 its reverse (5544154327), we get a palindrome (77889298877).

The spelling of 72345144550 in words is "seventy-two billion, three hundred forty-five million, one hundred forty-four thousand, five hundred fifty".