72150206777 has 4 divisors (see below), whose sum is σ = 78709316496. Its totient is φ = 65591097060.

The previous prime is 72150206767. The next prime is 72150206851. The reversal of 72150206777 is 77760205127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77760205127 = 11 ⋅7069109557.

It is a cyclic number.

It is not a de Polignac number, because 72150206777 - 2¹⁴ = 72150190393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72150206767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3279554843 + ... + 3279554864.

It is an arithmetic number, because the mean of its divisors is an integer number (19677329124).

Almost surely, 2^72150206777 is an apocalyptic number.

It is an amenable number.

72150206777 is a deficient number, since it is larger than the sum of its proper divisors (6559109719).

72150206777 is a wasteful number, since it uses less digits than its factorization.

72150206777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6559109718.

The product of its (nonzero) digits is 288120, while the sum is 44.

The spelling of 72150206777 in words is "seventy-two billion, one hundred fifty million, two hundred six thousand, seven hundred seventy-seven".