538226766691 has 8 divisors (see below), whose sum is σ = 556797509280. Its totient is φ = 519656770752.

The previous prime is 538226766661. The next prime is 538226766739. The reversal of 538226766691 is 196667622835.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-538226766691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (538226766601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1555711 + ... + 1869943.

It is an arithmetic number, because the mean of its divisors is an integer number (69599688660).

Almost surely, 2^538226766691 is an apocalyptic number.

538226766691 is a deficient number, since it is larger than the sum of its proper divisors (18570742589).

538226766691 is a wasteful number, since it uses less digits than its factorization.

538226766691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373325.

The product of its digits is 39191040, while the sum is 61.

The spelling of 538226766691 in words is "five hundred thirty-eight billion, two hundred twenty-six million, seven hundred sixty-six thousand, six hundred ninety-one".