1649854518 has 16 divisors (see below), whose sum is σ = 3553532976. Its totient is φ = 507647520.

The previous prime is 1649854511. The next prime is 1649854553. The reversal of 1649854518 is 8154589461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649854511) 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, 10575913 + ... + 10576068.

It is an arithmetic number, because the mean of its divisors is an integer number (222095811).

Almost surely, 2^1649854518 is an apocalyptic number.

1649854518 is an abundant number, since it is smaller than the sum of its proper divisors (1903678458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1649854518 is a wasteful number, since it uses less digits than its factorization.

1649854518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21151999.

The product of its digits is 1382400, while the sum is 51.

The square root of 1649854518 is about 40618.4012240758. The cubic root of 1649854518 is about 1181.6310199323.

The spelling of 1649854518 in words is "one billion, six hundred forty-nine million, eight hundred fifty-four thousand, five hundred eighteen".