72770524271 has 4 divisors (see below), whose sum is σ = 72776702544. Its totient is φ = 72764346000.

The previous prime is 72770524261. The next prime is 72770524273. The reversal of 72770524271 is 17242507727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17242507727 = 23 ⋅749674249.

It is a cyclic number.

It is not a de Polignac number, because 72770524271 - 2¹⁸ = 72770262127 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 (72770524273) 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, 3071435 + ... + 3095036.

It is an arithmetic number, because the mean of its divisors is an integer number (18194175636).

Almost surely, 2^72770524271 is an apocalyptic number.

72770524271 is a deficient number, since it is larger than the sum of its proper divisors (6178273).

72770524271 is a wasteful number, since it uses less digits than its factorization.

72770524271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178272.

The product of its (nonzero) digits is 384160, while the sum is 44.

The spelling of 72770524271 in words is "seventy-two billion, seven hundred seventy million, five hundred twenty-four thousand, two hundred seventy-one".