649135553 has 4 divisors (see below), whose sum is σ = 708147888. Its totient is φ = 590123220.

The previous prime is 649135549. The next prime is 649135603. The reversal of 649135553 is 355531946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 649135553 - 2² = 649135549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 649135553.

It is not an unprimeable number, because it can be changed into a prime (649135153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29506151 + ... + 29506172.

It is an arithmetic number, because the mean of its divisors is an integer number (177036972).

Almost surely, 2^649135553 is an apocalyptic number.

It is an amenable number.

649135553 is a deficient number, since it is larger than the sum of its proper divisors (59012335).

649135553 is a wasteful number, since it uses less digits than its factorization.

649135553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59012334.

The product of its digits is 243000, while the sum is 41.

The square root of 649135553 is about 25478.1387271520. The cubic root of 649135553 is about 865.8549258553.

The spelling of 649135553 in words is "six hundred forty-nine million, one hundred thirty-five thousand, five hundred fifty-three".