8612661231 has 20 divisors (see below), whose sum is σ = 13083899400. Its totient is φ = 5644452816.

The previous prime is 8612661229. The next prime is 8612661263. The reversal of 8612661231 is 1321662168.

It is a happy number.

8612661231 is a `hidden beast` number, since 8 + 6 + 1 + 2 + 6 + 612 + 31 = 666.

It is not a de Polignac number, because 8612661231 - 2¹ = 8612661229 is a prime.

It is a super-2 number, since 2×8612661231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8612661271) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 896316 + ... + 905873.

It is an arithmetic number, because the mean of its divisors is an integer number (654194970).

Almost surely, 2^8612661231 is an apocalyptic number.

8612661231 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8612661231 is a deficient number, since it is larger than the sum of its proper divisors (4471238169).

8612661231 is a wasteful number, since it uses less digits than its factorization.

8612661231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802260 (or 1802251 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 8612661231 is about 92804.4246305099. The cubic root of 8612661231 is about 2049.8045604678.

The spelling of 8612661231 in words is "eight billion, six hundred twelve million, six hundred sixty-one thousand, two hundred thirty-one".