505525577578 has 12 divisors (see below), whose sum is σ = 882090548802. Its totient is φ = 216653818920.

The previous prime is 505525577537. The next prime is 505525577581. The reversal of 505525577578 is 875775525505.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 494232902289 + 11292675289 = 703017^2 + 106267^2 .

It is a super-2 number, since 2×505525577578² (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 5 ways as a sum of consecutive naturals, for example, 2579212033 + ... + 2579212228.

Almost surely, 2^505525577578 is an apocalyptic number.

505525577578 is a deficient number, since it is larger than the sum of its proper divisors (376564971224).

505525577578 is a wasteful number, since it uses less digits than its factorization.

505525577578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5158424277 (or 5158424270 counting only the distinct ones).

The product of its (nonzero) digits is 85750000, while the sum is 61.

The spelling of 505525577578 in words is "five hundred five billion, five hundred twenty-five million, five hundred seventy-seven thousand, five hundred seventy-eight".