1649260863 has 6 divisors (see below), whose sum is σ = 2382265704. Its totient is φ = 1099507236.

The previous prime is 1649260861. The next prime is 1649260867. The reversal of 1649260863 is 3680629461.

It is not a de Polignac number, because 1649260863 - 2¹ = 1649260861 is a prime.

It is a super-2 number, since 2×1649260863² = 5440122788447009538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649260861) 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, 91625595 + ... + 91625612.

It is an arithmetic number, because the mean of its divisors is an integer number (397044284).

Almost surely, 2^1649260863 is an apocalyptic number.

1649260863 is a deficient number, since it is larger than the sum of its proper divisors (733004841).

1649260863 is a wasteful number, since it uses less digits than its factorization.

1649260863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183251213 (or 183251210 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1649260863 is about 40611.0928565090. The cubic root of 1649260863 is about 1181.4892770677.

The spelling of 1649260863 in words is "one billion, six hundred forty-nine million, two hundred sixty thousand, eight hundred sixty-three".