2555551111550 has 48 divisors (see below), whose sum is σ = 4759586459232. Its totient is φ = 1020874752000.

The previous prime is 2555551111543. The next prime is 2555551111579. The reversal of 2555551111550 is 551111555552.

It is a junction number, because it is equal to n+sod(n) for n = 2555551111498 and 2555551111507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147056462 + ... + 147073838.

It is an arithmetic number, because the mean of its divisors is an integer number (99158051234).

Almost surely, 2^{2555551111550} is an apocalyptic number.

2555551111550 is a deficient number, since it is larger than the sum of its proper divisors (2204035347682).

2555551111550 is a wasteful number, since it uses less digits than its factorization.

2555551111550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21093 (or 21088 counting only the distinct ones).

The product of its (nonzero) digits is 156250, while the sum is 41.

The spelling of 2555551111550 in words is "two trillion, five hundred fifty-five billion, five hundred fifty-one million, one hundred eleven thousand, five hundred fifty".