28555158025 has 12 divisors (see below), whose sum is σ = 35418077964. Its totient is φ = 22837880000.

The previous prime is 28555157927. The next prime is 28555158031. The reversal of 28555158025 is 52085155582.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 4129219081 + 24425938944 = 64259^2 + 156288^2 .

It is not a de Polignac number, because 28555158025 - 2¹¹ = 28555155977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61786 + ... + 246835.

It is an arithmetic number, because the mean of its divisors is an integer number (2951506497).

Almost surely, 2^28555158025 is an apocalyptic number.

28555158025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28555158025 is a deficient number, since it is larger than the sum of its proper divisors (6862919939).

28555158025 is a wasteful number, since it uses less digits than its factorization.

28555158025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312332 (or 312327 counting only the distinct ones).

The product of its (nonzero) digits is 800000, while the sum is 46.

The spelling of 28555158025 in words is "twenty-eight billion, five hundred fifty-five million, one hundred fifty-eight thousand, twenty-five".