648648221431 has 8 divisors (see below), whose sum is σ = 741740029344. Its totient is φ = 555663357600.

The previous prime is 648648221423. The next prime is 648648221443. The reversal of 648648221431 is 134122846846.

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 648648221431 - 2³ = 648648221423 is a prime.

It is a super-2 number, since 2×648648221431² (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 (648648221401) 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, 26723020 + ... + 26747281.

It is an arithmetic number, because the mean of its divisors is an integer number (92717503668).

Almost surely, 2^648648221431 is an apocalyptic number.

648648221431 is a deficient number, since it is larger than the sum of its proper divisors (93091807913).

648648221431 is a wasteful number, since it uses less digits than its factorization.

648648221431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53472041.

The product of its digits is 1769472, while the sum is 49.

The spelling of 648648221431 in words is "six hundred forty-eight billion, six hundred forty-eight million, two hundred twenty-one thousand, four hundred thirty-one".