491478113026 has 8 divisors (see below), whose sum is σ = 743980630140. Its totient is φ = 243484569648.

The previous prime is 491478113011. The next prime is 491478113039. The reversal of 491478113026 is 620311874194.

It is a Cunningham number, because it is equal to 701055²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 491478113025 + 1 = 701055^2 + 1^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127243161 + ... + 1127243596.

Almost surely, 2^491478113026 is an apocalyptic number.

491478113026 is a deficient number, since it is larger than the sum of its proper divisors (252502517114).

491478113026 is a wasteful number, since it uses less digits than its factorization.

491478113026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254486868.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 491478113026 in words is "four hundred ninety-one billion, four hundred seventy-eight million, one hundred thirteen thousand, twenty-six".