505405351451 has 32 divisors (see below), whose sum is σ = 684194520576. Its totient is φ = 363528237600.

The previous prime is 505405351447. The next prime is 505405351453. The reversal of 505405351451 is 154153504505.

It is not a de Polignac number, because 505405351451 - 2² = 505405351447 is a prime.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (505405351453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1965245 + ... + 2207486.

It is an arithmetic number, because the mean of its divisors is an integer number (21381078768).

Almost surely, 2^505405351451 is an apocalyptic number.

505405351451 is a deficient number, since it is larger than the sum of its proper divisors (178789169125).

505405351451 is a wasteful number, since it uses less digits than its factorization.

505405351451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172784 (or 4172762 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 38.

Adding to 505405351451 its reverse (154153504505), we get a palindrome (659558855956).

The spelling of 505405351451 in words is "five hundred five billion, four hundred five million, three hundred fifty-one thousand, four hundred fifty-one".