494880021287 has 4 divisors (see below), whose sum is σ = 498776714496. Its totient is φ = 490983328080.

The previous prime is 494880021277. The next prime is 494880021323. The reversal of 494880021287 is 782120088494.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 494880021287 - 2¹⁶ = 494879955751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494880021217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1948346414 + ... + 1948346667.

It is an arithmetic number, because the mean of its divisors is an integer number (124694178624).

Almost surely, 2^494880021287 is an apocalyptic number.

494880021287 is a deficient number, since it is larger than the sum of its proper divisors (3896693209).

494880021287 is a wasteful number, since it uses less digits than its factorization.

494880021287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896693208.

The product of its (nonzero) digits is 2064384, while the sum is 53.

The spelling of 494880021287 in words is "four hundred ninety-four billion, eight hundred eighty million, twenty-one thousand, two hundred eighty-seven".