495979551 has 8 divisors (see below), whose sum is σ = 734784560. Its totient is φ = 330653016.

The previous prime is 495979543. The next prime is 495979637. The reversal of 495979551 is 155979594.

495979551 is a `hidden beast` number, since 49 + 597 + 9 + 5 + 5 + 1 = 666.

It is not a de Polignac number, because 495979551 - 2³ = 495979543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (495979651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9184780 + ... + 9184833.

It is an arithmetic number, because the mean of its divisors is an integer number (91848070).

Almost surely, 2^495979551 is an apocalyptic number.

495979551 is a deficient number, since it is larger than the sum of its proper divisors (238805009).

495979551 is a wasteful number, since it uses less digits than its factorization.

495979551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18369622 (or 18369616 counting only the distinct ones).

The product of its digits is 2551500, while the sum is 54.

The square root of 495979551 is about 22270.5983529855. The cubic root of 495979551 is about 791.5674434364.

The spelling of 495979551 in words is "four hundred ninety-five million, nine hundred seventy-nine thousand, five hundred fifty-one".