648575361551 has 8 divisors (see below), whose sum is σ = 701515846080. Its totient is φ = 596070601632.

The previous prime is 648575361547. The next prime is 648575361563. The reversal of 648575361551 is 155163575846.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 648575361551 - 2² = 648575361547 is a prime.

It is a super-4 number, since 4×648575361551⁴ (a number of 48 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648575361571) 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, 108928055 + ... + 108934008.

It is an arithmetic number, because the mean of its divisors is an integer number (87689480760).

Almost surely, 2^648575361551 is an apocalyptic number.

648575361551 is a deficient number, since it is larger than the sum of its proper divisors (52940484529).

648575361551 is a wasteful number, since it uses less digits than its factorization.

648575361551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217862305.

The product of its digits is 15120000, while the sum is 56.

The spelling of 648575361551 in words is "six hundred forty-eight billion, five hundred seventy-five million, three hundred sixty-one thousand, five hundred fifty-one".