393397488081 has 48 divisors (see below), whose sum is σ = 639688591360. Its totient is φ = 231315626880.

The previous prime is 393397488059. The next prime is 393397488247. The reversal of 393397488081 is 180884793393.

393397488081 is a `hidden beast` number, since 3 + 93 + 397 + 4 + 8 + 80 + 81 = 666.

It is not a de Polignac number, because 393397488081 - 2¹⁰ = 393397487057 is a prime.

It is a super-2 number, since 2×393397488081² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (393397488581) 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, 399946 + ... + 973011.

Almost surely, 2^393397488081 is an apocalyptic number.

393397488081 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

393397488081 is a deficient number, since it is larger than the sum of its proper divisors (246291103279).

393397488081 is a wasteful number, since it uses less digits than its factorization.

393397488081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373086 (or 1373083 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 393397488081 in words is "three hundred ninety-three billion, three hundred ninety-seven million, four hundred eighty-eight thousand, eighty-one".