491445037087 has 2 divisors, whose sum is σ = 491445037088. Its totient is φ = 491445037086.

The previous prime is 491445037067. The next prime is 491445037117. The reversal of 491445037087 is 780730544194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491445037087 - 2³¹ = 489297553439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491445037067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245722518543 + 245722518544.

It is an arithmetic number, because the mean of its divisors is an integer number (245722518544).

Almost surely, 2^491445037087 is an apocalyptic number.

491445037087 is a deficient number, since it is larger than the sum of its proper divisors (1).

491445037087 is an equidigital number, since it uses as much as digits as its factorization.

491445037087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The spelling of 491445037087 in words is "four hundred ninety-one billion, four hundred forty-five million, thirty-seven thousand, eighty-seven".