1656286138 has 8 divisors (see below), whose sum is σ = 2675539188. Its totient is φ = 764439744.

The previous prime is 1656286133. The next prime is 1656286141. The reversal of 1656286138 is 8316826561.

It can be written as a sum of positive squares in 2 ways, for example, as 1540013049 + 116273089 = 39243^2 + 10783^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1656286133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31851631 + ... + 31851682.

Almost surely, 2^1656286138 is an apocalyptic number.

1656286138 is a deficient number, since it is larger than the sum of its proper divisors (1019253050).

1656286138 is a wasteful number, since it uses less digits than its factorization.

1656286138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63703328.

The product of its digits is 414720, while the sum is 46.

The square root of 1656286138 is about 40697.4954757661. The cubic root of 1656286138 is about 1183.1644778879.

The spelling of 1656286138 in words is "one billion, six hundred fifty-six million, two hundred eighty-six thousand, one hundred thirty-eight".