72776028607 has 4 divisors (see below), whose sum is σ = 72776748456. Its totient is φ = 72775308760.

The previous prime is 72776028571. The next prime is 72776028629. The reversal of 72776028607 is 70682067727.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 70682067727 = 67003 ⋅1054909.

It is a cyclic number.

It is not a de Polignac number, because 72776028607 - 2²³ = 72767639999 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 (72776028697) 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, 177433 + ... + 420754.

It is an arithmetic number, because the mean of its divisors is an integer number (18194187114).

Almost surely, 2^72776028607 is an apocalyptic number.

72776028607 is a deficient number, since it is larger than the sum of its proper divisors (719849).

72776028607 is a wasteful number, since it uses less digits than its factorization.

72776028607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719848.

The product of its (nonzero) digits is 2765952, while the sum is 52.

The spelling of 72776028607 in words is "seventy-two billion, seven hundred seventy-six million, twenty-eight thousand, six hundred seven".