491773776650 has 192 divisors, whose sum is σ = 1083710638080. Its totient is φ = 164280441600.

The previous prime is 491773776647. The next prime is 491773776667. The reversal of 491773776650 is 56677377194.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 275811659 + ... + 275813441.

It is an arithmetic number, because the mean of its divisors is an integer number (5644326240).

Almost surely, 2^491773776650 is an apocalyptic number.

491773776650 is an abundant number, since it is smaller than the sum of its proper divisors (591936861430).

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

491773776650 is a wasteful number, since it uses less digits than its factorization.

491773776650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2821 (or 2816 counting only the distinct ones).

The product of its (nonzero) digits is 46675440, while the sum is 62.

The spelling of 491773776650 in words is "four hundred ninety-one billion, seven hundred seventy-three million, seven hundred seventy-six thousand, six hundred fifty".