494639667957 has 8 divisors (see below), whose sum is σ = 659671994176. Its totient is φ = 329683560192.

The previous prime is 494639667947. The next prime is 494639667959. The reversal of 494639667957 is 759766936494.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 494639667957 - 2⁴ = 494639667941 is a prime.

It is a super-2 number, since 2×494639667957² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494639667959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19039468 + ... + 19065429.

It is an arithmetic number, because the mean of its divisors is an integer number (82458999272).

Almost surely, 2^494639667957 is an apocalyptic number.

It is an amenable number.

494639667957 is a deficient number, since it is larger than the sum of its proper divisors (165032326219).

494639667957 is a wasteful number, since it uses less digits than its factorization.

494639667957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38109227.

The product of its digits is 1851776640, while the sum is 75.

The spelling of 494639667957 in words is "four hundred ninety-four billion, six hundred thirty-nine million, six hundred sixty-seven thousand, nine hundred fifty-seven".