28204664537 has 12 divisors (see below), whose sum is σ = 32279159808. Its totient is φ = 24141513000.

The previous prime is 28204664479. The next prime is 28204664597. The reversal of 28204664537 is 73546640282.

It is not a de Polignac number, because 28204664537 - 2¹⁸ = 28204402393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28204664491 and 28204664500.

It is not an unprimeable number, because it can be changed into a prime (28204664597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15073712 + ... + 15075582.

It is an arithmetic number, because the mean of its divisors is an integer number (2689929984).

Almost surely, 2^28204664537 is an apocalyptic number.

It is an amenable number.

28204664537 is a deficient number, since it is larger than the sum of its proper divisors (4074495271).

28204664537 is an frugal number, since it uses more digits than its factorization.

28204664537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4900 (or 3029 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 47.

The spelling of 28204664537 in words is "twenty-eight billion, two hundred four million, six hundred sixty-four thousand, five hundred thirty-seven".