28555800563131 has 4 divisors (see below), whose sum is σ = 29540483341200. Its totient is φ = 27571117785064.

The previous prime is 28555800563107. The next prime is 28555800563149. The reversal of 28555800563131 is 13136500855582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28555800563131 is a prime.

It is a super-2 number, since 2×28555800563131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28555800561131) 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, 492341388991 + ... + 492341389048.

It is an arithmetic number, because the mean of its divisors is an integer number (7385120835300).

Almost surely, 2^{28555800563131} is an apocalyptic number.

28555800563131 is a deficient number, since it is larger than the sum of its proper divisors (984682778069).

28555800563131 is an equidigital number, since it uses as much as digits as its factorization.

28555800563131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 984682778068.

The product of its (nonzero) digits is 4320000, while the sum is 52.

The spelling of 28555800563131 in words is "twenty-eight trillion, five hundred fifty-five billion, eight hundred million, five hundred sixty-three thousand, one hundred thirty-one".