72458445557 has 8 divisors (see below), whose sum is σ = 72861568416. Its totient is φ = 72056383312.

The previous prime is 72458445539. The next prime is 72458445571. The reversal of 72458445557 is 75554485427.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72458445557 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 (72458445457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127943 + ... + 401604.

It is an arithmetic number, because the mean of its divisors is an integer number (9107696052).

Almost surely, 2^72458445557 is an apocalyptic number.

It is an amenable number.

72458445557 is a deficient number, since it is larger than the sum of its proper divisors (403122859).

72458445557 is a wasteful number, since it uses less digits than its factorization.

72458445557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530307.

The product of its digits is 31360000, while the sum is 56.

The spelling of 72458445557 in words is "seventy-two billion, four hundred fifty-eight million, four hundred forty-five thousand, five hundred fifty-seven".