648925728923 has 4 divisors (see below), whose sum is σ = 664753185768. Its totient is φ = 633098272080.

The previous prime is 648925728877. The next prime is 648925728949. The reversal of 648925728923 is 329827529846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648925728923 is a prime.

It is a super-2 number, since 2×648925728923² (a number of 24 digits) contains 22 as substring.

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 648925728923.

It is not an unprimeable number, because it can be changed into a prime (648925428923) 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, 7913728361 + ... + 7913728442.

It is an arithmetic number, because the mean of its divisors is an integer number (166188296442).

Almost surely, 2^648925728923 is an apocalyptic number.

648925728923 is a deficient number, since it is larger than the sum of its proper divisors (15827456845).

648925728923 is a wasteful number, since it uses less digits than its factorization.

648925728923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15827456844.

The product of its digits is 104509440, while the sum is 65.

The spelling of 648925728923 in words is "six hundred forty-eight billion, nine hundred twenty-five million, seven hundred twenty-eight thousand, nine hundred twenty-three".