72542776057 has 8 divisors (see below), whose sum is σ = 78069179592. Its totient is φ = 67156281600.

The previous prime is 72542776049. The next prime is 72542776063. The reversal of 72542776057 is 75067724527.

It can be written as a sum of positive squares in 4 ways, for example, as 13423771321 + 59119004736 = 115861^2 + 243144^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 72542776057 - 2³ = 72542776049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72542775995 and 72542776013.

It is not an unprimeable number, because it can be changed into a prime (72542776357) 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, 34976194 + ... + 34978267.

It is an arithmetic number, because the mean of its divisors is an integer number (9758647449).

Almost surely, 2^72542776057 is an apocalyptic number.

It is an amenable number.

72542776057 is a deficient number, since it is larger than the sum of its proper divisors (5526403535).

72542776057 is a wasteful number, since it uses less digits than its factorization.

72542776057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69954539.

The product of its (nonzero) digits is 5762400, while the sum is 52.

The spelling of 72542776057 in words is "seventy-two billion, five hundred forty-two million, seven hundred seventy-six thousand, fifty-seven".