72938986849 has 4 divisors (see below), whose sum is σ = 72964115136. Its totient is φ = 72913858564.

The previous prime is 72938986807. The next prime is 72938986859. The reversal of 72938986849 is 94868983927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94868983927 = 131 ⋅724190717.

It is a cyclic number.

It is not a de Polignac number, because 72938986849 - 2⁷ = 72938986721 is a prime.

It is a super-3 number, since 3×72938986849³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72938986859) 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 3 ways as a sum of consecutive naturals, for example, 12559789 + ... + 12565594.

It is an arithmetic number, because the mean of its divisors is an integer number (18241028784).

Almost surely, 2^72938986849 is an apocalyptic number.

It is an amenable number.

72938986849 is a deficient number, since it is larger than the sum of its proper divisors (25128287).

72938986849 is a wasteful number, since it uses less digits than its factorization.

72938986849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25128286.

The product of its digits is 376233984, while the sum is 73.

The spelling of 72938986849 in words is "seventy-two billion, nine hundred thirty-eight million, nine hundred eighty-six thousand, eight hundred forty-nine".