787393311081 has 48 divisors (see below), whose sum is σ = 1201482725184. Its totient is φ = 455876822016.

The previous prime is 787393311079. The next prime is 787393311091. The reversal of 787393311081 is 180113393787.

787393311081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 787393311081 - 2¹ = 787393311079 is a prime.

It is a super-3 number, since 3×787393311081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (787393311011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34218526 + ... + 34241528.

It is an arithmetic number, because the mean of its divisors is an integer number (25030890108).

Almost surely, 2^787393311081 is an apocalyptic number.

It is an amenable number.

787393311081 is a deficient number, since it is larger than the sum of its proper divisors (414089414103).

787393311081 is a wasteful number, since it uses less digits than its factorization.

787393311081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26090 (or 26073 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 51.

The spelling of 787393311081 in words is "seven hundred eighty-seven billion, three hundred ninety-three million, three hundred eleven thousand, eighty-one".