748655214521 has 8 divisors (see below), whose sum is σ = 766927600488. Its totient is φ = 730383424000.

The previous prime is 748655214473. The next prime is 748655214533. The reversal of 748655214521 is 125412556847.

It can be written as a sum of positive squares in 4 ways, for example, as 3333792121 + 745321422400 = 57739^2 + 863320^2 .

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-748655214521 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 748655214521.

It is not an unprimeable number, because it can be changed into a prime (748655216521) 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, 3438461 + ... + 3649701.

It is an arithmetic number, because the mean of its divisors is an integer number (95865950061).

Almost surely, 2^748655214521 is an apocalyptic number.

It is an amenable number.

748655214521 is a deficient number, since it is larger than the sum of its proper divisors (18272385967).

748655214521 is a wasteful number, since it uses less digits than its factorization.

748655214521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297723.

The product of its digits is 2688000, while the sum is 50.

The spelling of 748655214521 in words is "seven hundred forty-eight billion, six hundred fifty-five million, two hundred fourteen thousand, five hundred twenty-one".