72103437817 has 8 divisors (see below), whose sum is σ = 75254195520. Its totient is φ = 68953998960.

The previous prime is 72103437799. The next prime is 72103437821. The reversal of 72103437817 is 71873430127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72103437817 - 2⁷ = 72103437689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72103438817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217159 + ... + 437452.

It is an arithmetic number, because the mean of its divisors is an integer number (9406774440).

Almost surely, 2^72103437817 is an apocalyptic number.

It is an amenable number.

72103437817 is a deficient number, since it is larger than the sum of its proper divisors (3150757703).

72103437817 is a wasteful number, since it uses less digits than its factorization.

72103437817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659423.

The product of its (nonzero) digits is 197568, while the sum is 43.

The spelling of 72103437817 in words is "seventy-two billion, one hundred three million, four hundred thirty-seven thousand, eight hundred seventeen".