1648637263 has 32 divisors (see below), whose sum is σ = 2123476992. Its totient is φ = 1244073600.

The previous prime is 1648637251. The next prime is 1648637273. The reversal of 1648637263 is 3627368461.

It is not a de Polignac number, because 1648637263 - 2⁹ = 1648636751 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648637273) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 880218 + ... + 882088.

It is an arithmetic number, because the mean of its divisors is an integer number (66358656).

Almost surely, 2^1648637263 is an apocalyptic number.

1648637263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1648637263 is a deficient number, since it is larger than the sum of its proper divisors (474839729).

1648637263 is a wasteful number, since it uses less digits than its factorization.

1648637263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335.

The product of its digits is 870912, while the sum is 46.

The square root of 1648637263 is about 40603.4144253904. The cubic root of 1648637263 is about 1181.3403478090.

The spelling of 1648637263 in words is "one billion, six hundred forty-eight million, six hundred thirty-seven thousand, two hundred sixty-three".