72444236535545 has 32 divisors (see below), whose sum is σ = 100490747682816. Its totient is φ = 49109505984000.

The previous prime is 72444236535497. The next prime is 72444236535599. The reversal of 72444236535545 is 54553563244427.

It is not a de Polignac number, because 72444236535545 - 2⁸ = 72444236535289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27750806 + ... + 30248895.

It is an arithmetic number, because the mean of its divisors is an integer number (3140335865088).

Almost surely, 2^{72444236535545} is an apocalyptic number.

It is an amenable number.

72444236535545 is a deficient number, since it is larger than the sum of its proper divisors (28046511147271).

72444236535545 is a wasteful number, since it uses less digits than its factorization.

72444236535545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58000121.

The product of its digits is 241920000, while the sum is 59.

The spelling of 72444236535545 in words is "seventy-two trillion, four hundred forty-four billion, two hundred thirty-six million, five hundred thirty-five thousand, five hundred forty-five".