1649511487 has 6 divisors (see below), whose sum is σ = 1786157592. Its totient is φ = 1522625832.

The previous prime is 1649511469. The next prime is 1649511491. The reversal of 1649511487 is 7841159461.

It is a de Polignac number, because none of the positive numbers 2^k-1649511487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649511427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4880043 + ... + 4880380.

It is an arithmetic number, because the mean of its divisors is an integer number (297692932).

Almost surely, 2^1649511487 is an apocalyptic number.

1649511487 is a deficient number, since it is larger than the sum of its proper divisors (136646105).

1649511487 is an equidigital number, since it uses as much as digits as its factorization.

1649511487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9760449 (or 9760436 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 1649511487 is about 40614.1783986824. The cubic root of 1649511487 is about 1181.5491209605.

The spelling of 1649511487 in words is "one billion, six hundred forty-nine million, five hundred eleven thousand, four hundred eighty-seven".