1659211138 has 32 divisors (see below), whose sum is σ = 2848809600. Its totient is φ = 718419456.

The previous prime is 1659211129. The next prime is 1659211139. The reversal of 1659211138 is 8311129561.

It is a super-3 number, since 3×1659211138³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1659211097 and 1659211106.

It is not an unprimeable number, because it can be changed into a prime (1659211139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34578 + ... + 67186.

It is an arithmetic number, because the mean of its divisors is an integer number (89025300).

Almost surely, 2^1659211138 is an apocalyptic number.

1659211138 is a deficient number, since it is larger than the sum of its proper divisors (1189598462).

1659211138 is a wasteful number, since it uses less digits than its factorization.

1659211138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32746.

The product of its digits is 12960, while the sum is 37.

The square root of 1659211138 is about 40733.4154963710. The cubic root of 1659211138 is about 1183.8605574650.

It can be divided in two parts, 16592 and 11138, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 1659211138 in words is "one billion, six hundred fifty-nine million, two hundred eleven thousand, one hundred thirty-eight".