649598553 has 12 divisors (see below), whose sum is σ = 938797860. Its totient is φ = 432840096.

The previous prime is 649598539. The next prime is 649598557. The reversal of 649598553 is 355895946.

It is a happy number.

649598553 is a `hidden beast` number, since 6 + 49 + 598 + 5 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 428986944 + 220611609 = 20712^2 + 14853^2 .

It is not a de Polignac number, because 649598553 - 2⁶ = 649598489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 649598553.

It is not an unprimeable number, because it can be changed into a prime (649598557) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 475 + ... + 36047.

It is an arithmetic number, because the mean of its divisors is an integer number (78233155).

Almost surely, 2^649598553 is an apocalyptic number.

It is an amenable number.

649598553 is a deficient number, since it is larger than the sum of its proper divisors (289199307).

649598553 is a wasteful number, since it uses less digits than its factorization.

649598553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37608 (or 37605 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 649598553 is about 25487.2233285621. The cubic root of 649598553 is about 866.0607357481.

The spelling of 649598553 in words is "six hundred forty-nine million, five hundred ninety-eight thousand, five hundred fifty-three".