494511156550561 has 4 divisors (see below), whose sum is σ = 494511466406832. Its totient is φ = 494510846694292.

The previous prime is 494511156550553. The next prime is 494511156550633. The reversal of 494511156550561 is 165055651115494.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 494511156550561 - 2³ = 494511156550553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 494511156550496 and 494511156550505.

It is not an unprimeable number, because it can be changed into a prime (494511156550531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152521771 + ... + 155730256.

It is an arithmetic number, because the mean of its divisors is an integer number (123627866601708).

Almost surely, 2^{494511156550561} is an apocalyptic number.

It is an amenable number.

494511156550561 is a deficient number, since it is larger than the sum of its proper divisors (309856271).

494511156550561 is a wasteful number, since it uses less digits than its factorization.

494511156550561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309856270.

The product of its (nonzero) digits is 16200000, while the sum is 58.

The spelling of 494511156550561 in words is "four hundred ninety-four trillion, five hundred eleven billion, one hundred fifty-six million, five hundred fifty thousand, five hundred sixty-one".