494919957897 has 80 divisors (see below), whose sum is σ = 781758286848. Its totient is φ = 311401933920.

The previous prime is 494919957893. The next prime is 494919957919. The reversal of 494919957897 is 798759919494.

494919957897 is a `hidden beast` number, since 49 + 491 + 9 + 9 + 5 + 7 + 89 + 7 = 666.

It is not a de Polignac number, because 494919957897 - 2² = 494919957893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (494919957893) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 164369122 + ... + 164372132.

Almost surely, 2^494919957897 is an apocalyptic number.

It is an amenable number.

494919957897 is a deficient number, since it is larger than the sum of its proper divisors (286838328951).

494919957897 is a wasteful number, since it uses less digits than its factorization.

494919957897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4192 (or 4183 counting only the distinct ones).

The product of its digits is 1851776640, while the sum is 81.

The spelling of 494919957897 in words is "four hundred ninety-four billion, nine hundred nineteen million, nine hundred fifty-seven thousand, eight hundred ninety-seven".