649149475 has 24 divisors (see below), whose sum is σ = 871350480. Its totient is φ = 476891520.

The previous prime is 649149443. The next prime is 649149481. The reversal of 649149475 is 574941946.

It is not a de Polignac number, because 649149475 - 2⁵ = 649149443 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58956 + ... + 69094.

It is an arithmetic number, because the mean of its divisors is an integer number (36306270).

Almost surely, 2^649149475 is an apocalyptic number.

649149475 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

649149475 is a deficient number, since it is larger than the sum of its proper divisors (222201005).

649149475 is a wasteful number, since it uses less digits than its factorization.

649149475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10359 (or 10354 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The square root of 649149475 is about 25478.4119403074. The cubic root of 649149475 is about 865.8611158034.

The spelling of 649149475 in words is "six hundred forty-nine million, one hundred forty-nine thousand, four hundred seventy-five".