28479661737 has 4 divisors (see below), whose sum is σ = 37972882320. Its totient is φ = 18986441156.

The previous prime is 28479661709. The next prime is 28479661747. The reversal of 28479661737 is 73716697482.

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.

It is a cyclic number.

It is not a de Polignac number, because 28479661737 - 2⁶ = 28479661673 is a prime.

It is a super-2 number, since 2×28479661737² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28479661747) 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, 4746610287 + ... + 4746610292.

It is an arithmetic number, because the mean of its divisors is an integer number (9493220580).

Almost surely, 2^28479661737 is an apocalyptic number.

It is an amenable number.

28479661737 is a deficient number, since it is larger than the sum of its proper divisors (9493220583).

28479661737 is an equidigital number, since it uses as much as digits as its factorization.

28479661737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9493220582.

The product of its digits is 21337344, while the sum is 60.

The spelling of 28479661737 in words is "twenty-eight billion, four hundred seventy-nine million, six hundred sixty-one thousand, seven hundred thirty-seven".