72866261492 has 12 divisors (see below), whose sum is σ = 135016896420. Its totient is φ = 34290005376.

The previous prime is 72866261491. The next prime is 72866261513. The reversal of 72866261492 is 29416266827.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 30266952676 + 42599308816 = 173974^2 + 206396^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72866261491) 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, 535781267 + ... + 535781402.

It is an arithmetic number, because the mean of its divisors is an integer number (11251408035).

Almost surely, 2^72866261492 is an apocalyptic number.

It is an amenable number.

72866261492 is a deficient number, since it is larger than the sum of its proper divisors (62150634928).

72866261492 is a wasteful number, since it uses less digits than its factorization.

72866261492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071562690 (or 1071562688 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The spelling of 72866261492 in words is "seventy-two billion, eight hundred sixty-six million, two hundred sixty-one thousand, four hundred ninety-two".