1606351402 has 4 divisors (see below), whose sum is σ = 2409527106. Its totient is φ = 803175700.

The previous prime is 1606351391. The next prime is 1606351427. The reversal of 1606351402 is 2041536061.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1174501441 + 431849961 = 34271^2 + 20781^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401587849 + ... + 401587852.

Almost surely, 2^1606351402 is an apocalyptic number.

1606351402 is a deficient number, since it is larger than the sum of its proper divisors (803175704).

1606351402 is an equidigital number, since it uses as much as digits as its factorization.

1606351402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803175703.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1606351402 is about 40079.3138913330. The cubic root of 1606351402 is about 1171.1526862887.

Adding to 1606351402 its reverse (2041536061), we get a palindrome (3647887463).

The spelling of 1606351402 in words is "one billion, six hundred six million, three hundred fifty-one thousand, four hundred two".