491206550112 has 72 divisors (see below), whose sum is σ = 1400387513616. Its totient is φ = 163323046656.

The previous prime is 491206550111. The next prime is 491206550239. The reversal of 491206550112 is 211055602194.

491206550112 is a `hidden beast` number, since 4 + 91 + 2 + 0 + 6 + 550 + 1 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491206550111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2033748 + ... + 2262419.

It is an arithmetic number, because the mean of its divisors is an integer number (19449826578).

Almost surely, 2^491206550112 is an apocalyptic number.

It is an amenable number.

491206550112 is an abundant number, since it is smaller than the sum of its proper divisors (909180963504).

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

491206550112 is a wasteful number, since it uses less digits than its factorization.

491206550112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4296580 (or 4296569 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The spelling of 491206550112 in words is "four hundred ninety-one billion, two hundred six million, five hundred fifty thousand, one hundred twelve".