727768043137 has 4 divisors (see below), whose sum is σ = 727896109360. Its totient is φ = 727639976916.

The previous prime is 727768043129. The next prime is 727768043209. The reversal of 727768043137 is 731340867727.

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 727768043137 - 2³ = 727768043129 is a prime.

It is a super-2 number, since 2×727768043137² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (727768043437) 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, 64024587 + ... + 64035952.

It is an arithmetic number, because the mean of its divisors is an integer number (181974027340).

Almost surely, 2^727768043137 is an apocalyptic number.

It is an amenable number.

727768043137 is a deficient number, since it is larger than the sum of its proper divisors (128066223).

727768043137 is a wasteful number, since it uses less digits than its factorization.

727768043137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128066222.

The product of its (nonzero) digits is 8297856, while the sum is 55.

The spelling of 727768043137 in words is "seven hundred twenty-seven billion, seven hundred sixty-eight million, forty-three thousand, one hundred thirty-seven".