491275549025 has 12 divisors (see below), whose sum is σ = 619168267644. Its totient is φ = 386577480000.

The previous prime is 491275549003. The next prime is 491275549033. The reversal of 491275549025 is 520945572194.

It can be written as a sum of positive squares in 6 ways, for example, as 168387943201 + 322887605824 = 410351^2 + 568232^2 .

It is not a de Polignac number, because 491275549025 - 2¹⁸ = 491275286881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161072426 + ... + 161075475.

It is an arithmetic number, because the mean of its divisors is an integer number (51597355637).

Almost surely, 2^491275549025 is an apocalyptic number.

It is an amenable number.

491275549025 is a deficient number, since it is larger than the sum of its proper divisors (127892718619).

491275549025 is a wasteful number, since it uses less digits than its factorization.

491275549025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322147972 (or 322147967 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 491275549025 in words is "four hundred ninety-one billion, two hundred seventy-five million, five hundred forty-nine thousand, twenty-five".