72019618539 has 24 divisors (see below), whose sum is σ = 106885524480. Its totient is φ = 43095726960.

The previous prime is 72019618511. The next prime is 72019618543. The reversal of 72019618539 is 93581691027.

It is not a de Polignac number, because 72019618539 - 2¹⁷ = 72019487467 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72019618491 and 72019618500.

It is not an unprimeable number, because it can be changed into a prime (72019618439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1227027 + ... + 1284380.

It is an arithmetic number, because the mean of its divisors is an integer number (4453563520).

Almost surely, 2^72019618539 is an apocalyptic number.

72019618539 is a gapful number since it is divisible by the number (79) formed by its first and last digit.

72019618539 is a deficient number, since it is larger than the sum of its proper divisors (34865905941).

72019618539 is a wasteful number, since it uses less digits than its factorization.

72019618539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2511511 (or 2511500 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 51.

The spelling of 72019618539 in words is "seventy-two billion, nineteen million, six hundred eighteen thousand, five hundred thirty-nine".