72457274477 has 16 divisors (see below), whose sum is σ = 85019663232. Its totient is φ = 60454567680.

The previous prime is 72457274473. The next prime is 72457274479. The reversal of 72457274477 is 77447275427.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72457274477 - 2² = 72457274473 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72457274471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 157808 + ... + 412089.

It is an arithmetic number, because the mean of its divisors is an integer number (5313728952).

Almost surely, 2^72457274477 is an apocalyptic number.

It is an amenable number.

72457274477 is a deficient number, since it is larger than the sum of its proper divisors (12562388755).

72457274477 is a wasteful number, since it uses less digits than its factorization.

72457274477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570388.

The product of its digits is 21512960, while the sum is 56.

The spelling of 72457274477 in words is "seventy-two billion, four hundred fifty-seven million, two hundred seventy-four thousand, four hundred seventy-seven".