491050767636 has 432 divisors, whose sum is σ = 1600734320640. Its totient is φ = 130118451840.

The previous prime is 491050767587. The next prime is 491050767637. The reversal of 491050767636 is 636767050194.

It is a happy number.

491050767636 is a `hidden beast` number, since 4 + 9 + 10 + 507 + 67 + 63 + 6 = 666.

It is a super-2 number, since 2×491050767636² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491050767637) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 34324861 + ... + 34339163.

It is an arithmetic number, because the mean of its divisors is an integer number (3705403520).

Almost surely, 2^491050767636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491050767636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (800367160320).

491050767636 is an abundant number, since it is smaller than the sum of its proper divisors (1109683553004).

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

491050767636 is a wasteful number, since it uses less digits than its factorization.

491050767636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14378 (or 14351 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 54.

The spelling of 491050767636 in words is "four hundred ninety-one billion, fifty million, seven hundred sixty-seven thousand, six hundred thirty-six".