1654355138 has 4 divisors (see below), whose sum is σ = 2481532710. Its totient is φ = 827177568.

The previous prime is 1654355123. The next prime is 1654355173. The reversal of 1654355138 is 8315534561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8315534561 = 3779 ⋅2200459.

It can be written as a sum of positive squares in only one way, i.e., 1504121089 + 150234049 = 38783^2 + 12257^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1654355095 and 1654355104.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413588783 + ... + 413588786.

Almost surely, 2^1654355138 is an apocalyptic number.

1654355138 is a deficient number, since it is larger than the sum of its proper divisors (827177572).

1654355138 is an equidigital number, since it uses as much as digits as its factorization.

1654355138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827177571.

The product of its digits is 216000, while the sum is 41.

The square root of 1654355138 is about 40673.7647384650. The cubic root of 1654355138 is about 1182.7044971701.

Adding to 1654355138 its reverse (8315534561), we get a palindrome (9969889699).

The spelling of 1654355138 in words is "one billion, six hundred fifty-four million, three hundred fifty-five thousand, one hundred thirty-eight".