648910523623 has 4 divisors (see below), whose sum is σ = 650451879208. Its totient is φ = 647369168040.

The previous prime is 648910523549. The next prime is 648910523627. The reversal of 648910523623 is 326325019846.

648910523623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 648910523623 - 2¹³ = 648910515431 is a prime.

It is a super-2 number, since 2×648910523623² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648910523627) 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, 770677161 + ... + 770678002.

It is an arithmetic number, because the mean of its divisors is an integer number (162612969802).

Almost surely, 2^648910523623 is an apocalyptic number.

648910523623 is a deficient number, since it is larger than the sum of its proper divisors (1541355585).

648910523623 is a wasteful number, since it uses less digits than its factorization.

648910523623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541355584.

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 648910523623 in words is "six hundred forty-eight billion, nine hundred ten million, five hundred twenty-three thousand, six hundred twenty-three".