1649395503 has 24 divisors (see below), whose sum is σ = 2816704800. Its totient is φ = 910010304.

The previous prime is 1649395483. The next prime is 1649395511. The reversal of 1649395503 is 3055939461.

1649395503 is a `hidden beast` number, since 1 + 6 + 4 + 93 + 9 + 550 + 3 = 666.

It is not a de Polignac number, because 1649395503 - 2⁶ = 1649395439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649395513) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449568 + ... + 453221.

It is an arithmetic number, because the mean of its divisors is an integer number (117362700).

Almost surely, 2^1649395503 is an apocalyptic number.

1649395503 is a deficient number, since it is larger than the sum of its proper divisors (1167309297).

1649395503 is a wasteful number, since it uses less digits than its factorization.

1649395503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902831 (or 902828 counting only the distinct ones).

The product of its (nonzero) digits is 437400, while the sum is 45.

The square root of 1649395503 is about 40612.7504978424. The cubic root of 1649395503 is about 1181.5214271036.

The spelling of 1649395503 in words is "one billion, six hundred forty-nine million, three hundred ninety-five thousand, five hundred three".