1643504116 has 12 divisors (see below), whose sum is σ = 2876539680. Its totient is φ = 821635640.

The previous prime is 1643504099. The next prime is 1643504117. The reversal of 1643504116 is 6114053461.

It is a super-2 number, since 2×1643504116² = 5402211558617882912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1643504117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7881 + ... + 57871.

It is an arithmetic number, because the mean of its divisors is an integer number (239711640).

Almost surely, 2^1643504116 is an apocalyptic number.

It is an amenable number.

1643504116 is a deficient number, since it is larger than the sum of its proper divisors (1233035564).

1643504116 is a wasteful number, since it uses less digits than its factorization.

1643504116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58214 (or 58212 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1643504116 is about 40540.1543657643. The cubic root of 1643504116 is about 1180.1130112964.

Adding to 1643504116 its reverse (6114053461), we get a palindrome (7757557577).

The spelling of 1643504116 in words is "one billion, six hundred forty-three million, five hundred four thousand, one hundred sixteen".