1638000516 has 12 divisors (see below), whose sum is σ = 3822001232. Its totient is φ = 546000168.

The previous prime is 1638000509. The next prime is 1638000521. The reversal of 1638000516 is 6150008361.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68250010 + ... + 68250033.

Almost surely, 2^1638000516 is an apocalyptic number.

It is an amenable number.

1638000516 is an abundant number, since it is smaller than the sum of its proper divisors (2184000716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1638000516 is a wasteful number, since it uses less digits than its factorization.

1638000516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136500050 (or 136500048 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 1638000516 is about 40472.2190644397. The cubic root of 1638000516 is about 1178.7942572167.

Adding to 1638000516 its reverse (6150008361), we get a palindrome (7788008877).

The spelling of 1638000516 in words is "one billion, six hundred thirty-eight million, five hundred sixteen", and thus it is an aban number.