649566254255 has 4 divisors (see below), whose sum is σ = 779479505112. Its totient is φ = 519653003400.

The previous prime is 649566254221. The next prime is 649566254261. The reversal of 649566254255 is 552452665946.

It is a happy number.

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

It is not a de Polignac number, because 649566254255 - 2³⁶ = 580846777519 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 649566254194 and 649566254203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64956625421 + ... + 64956625430.

It is an arithmetic number, because the mean of its divisors is an integer number (194869876278).

Almost surely, 2^649566254255 is an apocalyptic number.

649566254255 is a deficient number, since it is larger than the sum of its proper divisors (129913250857).

649566254255 is a wasteful number, since it uses less digits than its factorization.

649566254255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129913250856.

The product of its digits is 77760000, while the sum is 59.

The spelling of 649566254255 in words is "six hundred forty-nine billion, five hundred sixty-six million, two hundred fifty-four thousand, two hundred fifty-five".