654911345815 has 4 divisors (see below), whose sum is σ = 785893614984. Its totient is φ = 523929076648.

The previous prime is 654911345813. The next prime is 654911345863. The reversal of 654911345815 is 518543119456.

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 654911345815 - 2¹ = 654911345813 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 (654911345813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65491134577 + ... + 65491134586.

It is an arithmetic number, because the mean of its divisors is an integer number (196473403746).

Almost surely, 2^654911345815 is an apocalyptic number.

654911345815 is a deficient number, since it is larger than the sum of its proper divisors (130982269169).

654911345815 is a wasteful number, since it uses less digits than its factorization.

654911345815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130982269168.

The product of its digits is 2592000, while the sum is 52.

The spelling of 654911345815 in words is "six hundred fifty-four billion, nine hundred eleven million, three hundred forty-five thousand, eight hundred fifteen".