72776028089 has 4 divisors (see below), whose sum is σ = 72790858020. Its totient is φ = 72761198160.

The previous prime is 72776028071. The next prime is 72776028103. The reversal of 72776028089 is 98082067727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98082067727 = 7 ⋅14011723961.

It can be written as a sum of positive squares in 2 ways, for example, as 61843234489 + 10932793600 = 248683^2 + 104560^2 .

It is a cyclic number.

It is not a de Polignac number, because 72776028089 - 2²⁴ = 72759250873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72776028029) 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 3 ways as a sum of consecutive naturals, for example, 7407602 + ... + 7417419.

It is an arithmetic number, because the mean of its divisors is an integer number (18197714505).

Almost surely, 2^72776028089 is an apocalyptic number.

It is an amenable number.

72776028089 is a deficient number, since it is larger than the sum of its proper divisors (14829931).

72776028089 is a wasteful number, since it uses less digits than its factorization.

72776028089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14829930.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 72776028089 in words is "seventy-two billion, seven hundred seventy-six million, twenty-eight thousand, eighty-nine".