1618400122 has 8 divisors (see below), whose sum is σ = 2441633076. Its totient is φ = 804522432.

The previous prime is 1618400099. The next prime is 1618400123. The reversal of 1618400122 is 2210048161.

It can be written as a sum of positive squares in 2 ways, for example, as 1424383081 + 194017041 = 37741^2 + 13929^2 .

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

It is a super-2 number, since 2×1618400122² = 5238437909779229768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1618400123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2338383 + ... + 2339074.

Almost surely, 2^1618400122 is an apocalyptic number.

1618400122 is a deficient number, since it is larger than the sum of its proper divisors (823232954).

1618400122 is a wasteful number, since it uses less digits than its factorization.

1618400122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4677632.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 1618400122 is about 40229.3440413835. The cubic root of 1618400122 is about 1174.0735408950.

Adding to 1618400122 its reverse (2210048161), we get a palindrome (3828448283).

The spelling of 1618400122 in words is "one billion, six hundred eighteen million, four hundred thousand, one hundred twenty-two".