72500405837 has 4 divisors (see below), whose sum is σ = 72505438656. Its totient is φ = 72495373020.

The previous prime is 72500405819. The next prime is 72500405849. The reversal of 72500405837 is 73850400527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 73850400527 = 37 ⋅1995956771.

It is a cyclic number.

It is not a de Polignac number, because 72500405837 - 2⁶ = 72500405773 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72500405794 and 72500405803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72500405137) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 2494739 + ... + 2523632.

It is an arithmetic number, because the mean of its divisors is an integer number (18126359664).

Almost surely, 2^72500405837 is an apocalyptic number.

It is an amenable number.

72500405837 is a deficient number, since it is larger than the sum of its proper divisors (5032819).

72500405837 is a wasteful number, since it uses less digits than its factorization.

72500405837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032818.

The product of its (nonzero) digits is 235200, while the sum is 41.

The spelling of 72500405837 in words is "seventy-two billion, five hundred million, four hundred five thousand, eight hundred thirty-seven".