494385791391 has 12 divisors (see below), whose sum is σ = 714666831840. Its totient is φ = 329334825120.

The previous prime is 494385791381. The next prime is 494385791401. The reversal of 494385791391 is 193197583494.

494385791391 is a `hidden beast` number, since 4 + 9 + 43 + 8 + 579 + 13 + 9 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (494385791381) and next prime (494385791401).

It is not a de Polignac number, because 494385791391 - 2⁹ = 494385790879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494385791321) 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, 21296295 + ... + 21319496.

It is an arithmetic number, because the mean of its divisors is an integer number (59555569320).

Almost surely, 2^494385791391 is an apocalyptic number.

494385791391 is a deficient number, since it is larger than the sum of its proper divisors (220281040449).

494385791391 is a wasteful number, since it uses less digits than its factorization.

494385791391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42617086 (or 42617083 counting only the distinct ones).

The product of its digits is 29393280, while the sum is 63.

The spelling of 494385791391 in words is "four hundred ninety-four billion, three hundred eighty-five million, seven hundred ninety-one thousand, three hundred ninety-one".