491134692510 has 768 divisors, whose sum is σ = 1734670080000. Its totient is φ = 95239065600.

The previous prime is 491134692497. The next prime is 491134692539. The reversal of 491134692510 is 15296431194.

491134692510 is a `hidden beast` number, since 4 + 9 + 1 + 1 + 3 + 46 + 92 + 510 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 383 ways as a sum of consecutive naturals, for example, 860130525 + ... + 860131095.

It is an arithmetic number, because the mean of its divisors is an integer number (2258685000).

Almost surely, 2^491134692510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491134692510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (867335040000).

491134692510 is an abundant number, since it is smaller than the sum of its proper divisors (1243535387490).

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

491134692510 is a wasteful number, since it uses less digits than its factorization.

491134692510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 491134692510 in words is "four hundred ninety-one billion, one hundred thirty-four million, six hundred ninety-two thousand, five hundred ten".