648672431 has 8 divisors (see below), whose sum is σ = 709686144. Its totient is φ = 587999320.

The previous prime is 648672403. The next prime is 648672443. The reversal of 648672431 is 134276846.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648672431 is a prime.

It is a super-2 number, since 2×648672431² = 841551845478899522, which 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 (648672631) 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, 81155 + ... + 88788.

It is an arithmetic number, because the mean of its divisors is an integer number (88710768).

Almost surely, 2^648672431 is an apocalyptic number.

648672431 is a deficient number, since it is larger than the sum of its proper divisors (61013713).

648672431 is a wasteful number, since it uses less digits than its factorization.

648672431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170301.

The product of its digits is 193536, while the sum is 41.

The square root of 648672431 is about 25469.0484902754. The cubic root of 648672431 is about 865.6489638063.

The spelling of 648672431 in words is "six hundred forty-eight million, six hundred seventy-two thousand, four hundred thirty-one".