491707408140 has 72 divisors (see below), whose sum is σ = 1606244207568. Its totient is φ = 121035669120.

The previous prime is 491707408121. The next prime is 491707408183. The reversal of 491707408140 is 41804707194.

It is a happy number.

491707408140 is a `hidden beast` number, since 491 + 7 + 0 + 7 + 40 + 81 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105063346 + ... + 105068025.

Almost surely, 2^491707408140 is an apocalyptic number.

It is an amenable number.

491707408140 is an abundant number, since it is smaller than the sum of its proper divisors (1114536799428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491707408140 is a wasteful number, since it uses less digits than its factorization.

491707408140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210131399 (or 210131394 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 491707408140 in words is "four hundred ninety-one billion, seven hundred seven million, four hundred eight thousand, one hundred forty".