18616419364 has 27 divisors (see below), whose sum is σ = 34616485267. Its totient is φ = 8758484864.

The previous prime is 18616419359. The next prime is 18616419373. The reversal of 18616419364 is 46391461681.

The square root of 18616419364 is 136442.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7133153764 + 11483265600 = 84458^2 + 107160^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4637022 + ... + 4641034.

Almost surely, 2^18616419364 is an apocalyptic number.

18616419364 is the 136442-nd square number.

It is an amenable number.

18616419364 is a deficient number, since it is larger than the sum of its proper divisors (16000065903).

18616419364 is an frugal number, since it uses more digits than its factorization.

18616419364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8064 (or 4032 counting only the distinct ones).

The product of its digits is 746496, while the sum is 49.

Multiplying 18616419364 by its sum of digits (49), we get a square (912204548836 = 955094²).

The spelling of 18616419364 in words is "eighteen billion, six hundred sixteen million, four hundred nineteen thousand, three hundred sixty-four".