649143465 has 8 divisors (see below), whose sum is σ = 1038629568. Its totient is φ = 346209840.

The previous prime is 649143409. The next prime is 649143491. The reversal of 649143465 is 564341946.

It is a happy number.

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

It is not a de Polignac number, because 649143465 - 2⁹ = 649142953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21638101 + ... + 21638130.

It is an arithmetic number, because the mean of its divisors is an integer number (129828696).

Almost surely, 2^649143465 is an apocalyptic number.

It is an amenable number.

649143465 is a deficient number, since it is larger than the sum of its proper divisors (389486103).

649143465 is a wasteful number, since it uses less digits than its factorization.

649143465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43276239.

The product of its digits is 311040, while the sum is 42.

The square root of 649143465 is about 25478.2939970478. The cubic root of 649143465 is about 865.8584436703.

The spelling of 649143465 in words is "six hundred forty-nine million, one hundred forty-three thousand, four hundred sixty-five".