631776945 has 8 divisors (see below), whose sum is σ = 1010843136. Its totient is φ = 336947696.

The previous prime is 631776851. The next prime is 631776973. The reversal of 631776945 is 549677136.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631776945 - 2¹⁵ = 631744177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 631776894 and 631776903.

It is an unprimeable number.

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, 21059217 + ... + 21059246.

It is an arithmetic number, because the mean of its divisors is an integer number (126355392).

Almost surely, 2^631776945 is an apocalyptic number.

It is an amenable number.

631776945 is a deficient number, since it is larger than the sum of its proper divisors (379066191).

631776945 is a wasteful number, since it uses less digits than its factorization.

631776945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42118471.

The product of its digits is 952560, while the sum is 48.

The square root of 631776945 is about 25135.1734626996. The cubic root of 631776945 is about 858.0671143049.

The spelling of 631776945 in words is "six hundred thirty-one million, seven hundred seventy-six thousand, nine hundred forty-five".