495631881 has 12 divisors (see below), whose sum is σ = 716487408. Its totient is φ = 330156024.

The previous prime is 495631849. The next prime is 495631907. The reversal of 495631881 is 188136594.

495631881 is a `hidden beast` number, since 4 + 9 + 5 + 631 + 8 + 8 + 1 = 666.

It is not a de Polignac number, because 495631881 - 2⁵ = 495631849 is a prime.

It is a super-2 number, since 2×495631881² = 491301922927196322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (495631831) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9915 + ... + 33008.

It is an arithmetic number, because the mean of its divisors is an integer number (59707284).

Almost surely, 2^495631881 is an apocalyptic number.

It is an amenable number.

495631881 is a deficient number, since it is larger than the sum of its proper divisors (220855527).

495631881 is a wasteful number, since it uses less digits than its factorization.

495631881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44212 (or 44209 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 495631881 is about 22262.7914017987. The cubic root of 495631881 is about 791.3824434826.

The spelling of 495631881 in words is "four hundred ninety-five million, six hundred thirty-one thousand, eight hundred eighty-one".