505405425501 has 16 divisors (see below), whose sum is σ = 748779449920. Its totient is φ = 336923148240.

The previous prime is 505405425443. The next prime is 505405425509. The reversal of 505405425501 is 105524504505.

505405425501 is a `hidden beast` number, since 5 + 0 + 54 + 0 + 54 + 2 + 550 + 1 = 666.

It is not a de Polignac number, because 505405425501 - 2⁷ = 505405425373 is a prime.

It is a super-2 number, since 2×505405425501² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505405425509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310791 + ... + 1052331.

It is an arithmetic number, because the mean of its divisors is an integer number (46798715620).

Almost surely, 2^505405425501 is an apocalyptic number.

It is an amenable number.

505405425501 is a deficient number, since it is larger than the sum of its proper divisors (243374024419).

505405425501 is a wasteful number, since it uses less digits than its factorization.

505405425501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766793 (or 766787 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 505405425501 in words is "five hundred five billion, four hundred five million, four hundred twenty-five thousand, five hundred one".