748643221759 has 4 divisors (see below), whose sum is σ = 759187492560. Its totient is φ = 738098950960.

The previous prime is 748643221723. The next prime is 748643221783. The reversal of 748643221759 is 957122346847.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 748643221759 - 2³³ = 740053287167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (748643221709) 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, 5272135294 + ... + 5272135435.

It is an arithmetic number, because the mean of its divisors is an integer number (189796873140).

Almost surely, 2^748643221759 is an apocalyptic number.

748643221759 is a deficient number, since it is larger than the sum of its proper divisors (10544270801).

748643221759 is a wasteful number, since it uses less digits than its factorization.

748643221759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10544270800.

The product of its digits is 20321280, while the sum is 58.

The spelling of 748643221759 in words is "seven hundred forty-eight billion, six hundred forty-three million, two hundred twenty-one thousand, seven hundred fifty-nine".