72775841812 has 24 divisors (see below), whose sum is σ = 130521482280. Its totient is φ = 35484771840.

The previous prime is 72775841753. The next prime is 72775841837. The reversal of 72775841812 is 21814857727.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1232431236 + 71543410576 = 35106^2 + 267476^2 .

It is a super-3 number, since 3×72775841812³ (a number of 34 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72775841812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280114 + ... + 473302.

It is an arithmetic number, because the mean of its divisors is an integer number (5438395095).

Almost surely, 2^72775841812 is an apocalyptic number.

It is an amenable number.

72775841812 is a deficient number, since it is larger than the sum of its proper divisors (57745640468).

72775841812 is a wasteful number, since it uses less digits than its factorization.

72775841812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195531 (or 195529 counting only the distinct ones).

The product of its digits is 1756160, while the sum is 52.

The spelling of 72775841812 in words is "seventy-two billion, seven hundred seventy-five million, eight hundred forty-one thousand, eight hundred twelve".