1638124353 has 12 divisors (see below), whose sum is σ = 2389608468. Its totient is φ = 1081269600.

The previous prime is 1638124309. The next prime is 1638124357. The reversal of 1638124353 is 3534218361.

1638124353 is a `hidden beast` number, since 1 + 638 + 12 + 4 + 3 + 5 + 3 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 720761409 + 917362944 = 26847^2 + 30288^2 .

It is not a de Polignac number, because 1638124353 - 2²⁵ = 1604569921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1638124357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 900150 + ... + 901967.

It is an arithmetic number, because the mean of its divisors is an integer number (199134039).

Almost surely, 2^1638124353 is an apocalyptic number.

It is an amenable number.

1638124353 is a deficient number, since it is larger than the sum of its proper divisors (751484115).

1638124353 is a wasteful number, since it uses less digits than its factorization.

1638124353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802224 (or 1802221 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 1638124353 is about 40473.7489368109. The cubic root of 1638124353 is about 1178.8239630815.

The spelling of 1638124353 in words is "one billion, six hundred thirty-eight million, one hundred twenty-four thousand, three hundred fifty-three".