505555406025 has 24 divisors (see below), whose sum is σ = 848327010144. Its totient is φ = 265605225600.

The previous prime is 505555406011. The next prime is 505555406107. The reversal of 505555406025 is 520604555505.

It is not a de Polignac number, because 505555406025 - 2⁴ = 505555406009 is a prime.

It is a super-2 number, since 2×505555406025² (a number of 24 digits) contains 22 as substring.

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, 50298996 + ... + 50309045.

It is an arithmetic number, because the mean of its divisors is an integer number (35346958756).

Almost surely, 2^505555406025 is an apocalyptic number.

It is an amenable number.

505555406025 is a deficient number, since it is larger than the sum of its proper divisors (342771604119).

505555406025 is a wasteful number, since it uses less digits than its factorization.

505555406025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100608121 (or 100608116 counting only the distinct ones).

The product of its (nonzero) digits is 750000, while the sum is 42.

The spelling of 505555406025 in words is "five hundred five billion, five hundred fifty-five million, four hundred six thousand, twenty-five".