1649511486 has 128 divisors (see below), whose sum is σ = 4432665600. Its totient is φ = 444165120.

The previous prime is 1649511469. The next prime is 1649511491. The reversal of 1649511486 is 6841159461.

1649511486 is a `hidden beast` number, since 16 + 49 + 511 + 4 + 86 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1730386 + ... + 1731338.

It is an arithmetic number, because the mean of its divisors is an integer number (34630200).

Almost surely, 2^1649511486 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1649511486, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2216332800).

1649511486 is an abundant number, since it is smaller than the sum of its proper divisors (2783154114).

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

1649511486 is a wasteful number, since it uses less digits than its factorization.

1649511486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231 (or 1225 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 1649511486 is about 40614.1783863714. The cubic root of 1649511486 is about 1181.5491207218.

The spelling of 1649511486 in words is "one billion, six hundred forty-nine million, five hundred eleven thousand, four hundred eighty-six".