491626653336 has 224 divisors, whose sum is σ = 1701008268960. Its totient is φ = 129659636736.

The previous prime is 491626653299. The next prime is 491626653337. The reversal of 491626653336 is 633356626194.

491626653336 is a `hidden beast` number, since 4 + 9 + 1 + 626 + 6 + 5 + 3 + 3 + 3 + 6 = 666.

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 (491626653337) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 67536 + ... + 993888.

It is an arithmetic number, because the mean of its divisors is an integer number (7593786915).

Almost surely, 2^491626653336 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 491626653336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850504134480).

491626653336 is an abundant number, since it is smaller than the sum of its proper divisors (1209381615624).

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

491626653336 is a wasteful number, since it uses less digits than its factorization.

491626653336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 926397 (or 926378 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 54.

The spelling of 491626653336 in words is "four hundred ninety-one billion, six hundred twenty-six million, six hundred fifty-three thousand, three hundred thirty-six".