1641602138 has 16 divisors (see below), whose sum is σ = 2803052736. Its totient is φ = 713739840.

The previous prime is 1641602047. The next prime is 1641602141. The reversal of 1641602138 is 8312061461.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1621631 + ... + 1622642.

It is an arithmetic number, because the mean of its divisors is an integer number (175190796).

Almost surely, 2^1641602138 is an apocalyptic number.

1641602138 is a deficient number, since it is larger than the sum of its proper divisors (1161450598).

1641602138 is a wasteful number, since it uses less digits than its factorization.

1641602138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244309.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1641602138 is about 40516.6896229196. The cubic root of 1641602138 is about 1179.6575991134.

Adding to 1641602138 its reverse (8312061461), we get a palindrome (9953663599).

The spelling of 1641602138 in words is "one billion, six hundred forty-one million, six hundred two thousand, one hundred thirty-eight".