494291957481 has 27 divisors (see below), whose sum is σ = 830569798461. Its totient is φ = 282444110424.

The previous prime is 494291957461. The next prime is 494291957503. The reversal of 494291957481 is 184759192494.

The square root of 494291957481 is 703059.

It is a perfect power (a square), and thus also a powerful number.

494291957481 is a `hidden beast` number, since 4 + 9 + 42 + 9 + 19 + 574 + 8 + 1 = 666.

It is not a de Polignac number, because 494291957481 - 2⁷ = 494291957353 is a prime.

It is a super-2 number, since 2×494291957481² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (494291957461) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 14747500 + ... + 14780978.

Almost surely, 2^494291957481 is an apocalyptic number.

494291957481 is the 703059-th square number.

494291957481 is the 351530-th centered octagonal number.

It is an amenable number.

494291957481 is a deficient number, since it is larger than the sum of its proper divisors (336277840980).

494291957481 is an frugal number, since it uses more digits than its factorization.

494291957481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66978 (or 33489 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 494291957481 in words is "four hundred ninety-four billion, two hundred ninety-one million, nine hundred fifty-seven thousand, four hundred eighty-one".