867631761 has 6 divisors (see below), whose sum is σ = 1253245890. Its totient is φ = 578421168.

The previous prime is 867631717. The next prime is 867631763. The reversal of 867631761 is 167136768.

867631761 is a `hidden beast` number, since 8 + 6 + 7 + 631 + 7 + 6 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 851180625 + 16451136 = 29175^2 + 4056^2 .

It is not a de Polignac number, because 867631761 - 2⁹ = 867631249 is a prime.

It is a super-2 number, since 2×867631761² = 1505569745391922242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (867631763) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48201756 + ... + 48201773.

It is an arithmetic number, because the mean of its divisors is an integer number (208874315).

Almost surely, 2^867631761 is an apocalyptic number.

It is an amenable number.

867631761 is a deficient number, since it is larger than the sum of its proper divisors (385614129).

867631761 is a wasteful number, since it uses less digits than its factorization.

867631761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96403535 (or 96403532 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 867631761 is about 29455.5896393197. The cubic root of 867631761 is about 953.7732706186.

The spelling of 867631761 in words is "eight hundred sixty-seven million, six hundred thirty-one thousand, seven hundred sixty-one".