28604121755 has 24 divisors (see below), whose sum is σ = 38692348272. Its totient is φ = 20131896000.

The previous prime is 28604121751. The next prime is 28604121809. The reversal of 28604121755 is 55712140682.

It is not a de Polignac number, because 28604121755 - 2² = 28604121751 is a prime.

It is a super-3 number, since 3×28604121755³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28604121751) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 217736 + ... + 323445.

It is an arithmetic number, because the mean of its divisors is an integer number (1612181178).

Almost surely, 2^28604121755 is an apocalyptic number.

28604121755 is a deficient number, since it is larger than the sum of its proper divisors (10088226517).

28604121755 is a wasteful number, since it uses less digits than its factorization.

28604121755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541259 (or 541228 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 28604121755 in words is "twenty-eight billion, six hundred four million, one hundred twenty-one thousand, seven hundred fifty-five".