787947273081 has 12 divisors (see below), whose sum is σ = 1205095829652. Its totient is φ = 494398288896.

The previous prime is 787947273077. The next prime is 787947273089. The reversal of 787947273081 is 180372749787.

787947273081 is a `hidden beast` number, since 7 + 87 + 9 + 472 + 7 + 3 + 0 + 81 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 738533984400 + 49413288681 = 859380^2 + 222291^2 .

It is not a de Polignac number, because 787947273081 - 2² = 787947273077 is a prime.

It is a super-2 number, since 2×787947273081² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (787947273089) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2574990936 + ... + 2574991241.

It is an arithmetic number, because the mean of its divisors is an integer number (100424652471).

Almost surely, 2^787947273081 is an apocalyptic number.

It is an amenable number.

787947273081 is a deficient number, since it is larger than the sum of its proper divisors (417148556571).

787947273081 is a wasteful number, since it uses less digits than its factorization.

787947273081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149982200 (or 5149982197 counting only the distinct ones).

The product of its (nonzero) digits is 33191424, while the sum is 63.

The spelling of 787947273081 in words is "seven hundred eighty-seven billion, nine hundred forty-seven million, two hundred seventy-three thousand, eighty-one".