28055525502550 has 72 divisors (see below), whose sum is σ = 65372457519936. Its totient is φ = 8879111357760.

The previous prime is 28055525502509. The next prime is 28055525502569. The reversal of 28055525502550 is 5520552555082.

It is a super-2 number, since 2×28055525502550² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 28055525502494 and 28055525502503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 440400262 + ... + 440463961.

It is an arithmetic number, because the mean of its divisors is an integer number (907950798888).

Almost surely, 2^{28055525502550} is an apocalyptic number.

28055525502550 is an abundant number, since it is smaller than the sum of its proper divisors (37316932017386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28055525502550 is a wasteful number, since it uses less digits than its factorization.

28055525502550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880864262 (or 880864250 counting only the distinct ones).

The product of its (nonzero) digits is 5000000, while the sum is 49.

The spelling of 28055525502550 in words is "twenty-eight trillion, fifty-five billion, five hundred twenty-five million, five hundred two thousand, five hundred fifty".