72103505399 has 32 divisors (see below), whose sum is σ = 76140380160. Its totient is φ = 68197852800.

The previous prime is 72103505333. The next prime is 72103505431. The reversal of 72103505399 is 99350530127.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72103505399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72103501399) 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, 109082129 + ... + 109082789.

It is an arithmetic number, because the mean of its divisors is an integer number (2379386880).

Almost surely, 2^72103505399 is an apocalyptic number.

72103505399 is a deficient number, since it is larger than the sum of its proper divisors (4036874761).

72103505399 is a wasteful number, since it uses less digits than its factorization.

72103505399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191.

The product of its (nonzero) digits is 255150, while the sum is 44.

The spelling of 72103505399 in words is "seventy-two billion, one hundred three million, five hundred five thousand, three hundred ninety-nine".