72773780456 has 64 divisors (see below), whose sum is σ = 147658998480. Its totient is φ = 33425602560.

The previous prime is 72773780399. The next prime is 72773780459. The reversal of 72773780456 is 65408737727.

It can be written as a sum of positive squares in 8 ways, for example, as 1145822500 + 71627957956 = 33850^2 + 267634^2 .

It is not an unprimeable number, because it can be changed into a prime (72773780459) 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 15 ways as a sum of consecutive naturals, for example, 20007470 + ... + 20011106.

Almost surely, 2^72773780456 is an apocalyptic number.

It is an amenable number.

72773780456 is an abundant number, since it is smaller than the sum of its proper divisors (74885218024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

72773780456 is a wasteful number, since it uses less digits than its factorization.

72773780456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534 (or 4530 counting only the distinct ones).

The product of its (nonzero) digits is 13829760, while the sum is 56.

The spelling of 72773780456 in words is "seventy-two billion, seven hundred seventy-three million, seven hundred eighty thousand, four hundred fifty-six".