81269010 has 48 divisors (see below), whose sum is σ = 223733016. Its totient is φ = 20396544.

The previous prime is 81269003. The next prime is 81269017. The reversal of 81269010 is 1096218.

It is an interprime number because it is at equal distance from previous prime (81269003) and next prime (81269017).

It can be written as a sum of positive squares in 4 ways, for example, as 81162081 + 106929 = 9009^2 + 327^2 .

It is not an unprimeable number, because it can be changed into a prime (81269017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25029 + ... + 28088.

Almost surely, 2^81269010 is an apocalyptic number.

81269010 is an abundant number, since it is smaller than the sum of its proper divisors (142464006).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81269010 is a wasteful number, since it uses less digits than its factorization.

81269010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53147 (or 53144 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 81269010 is about 9014.9326120609. The cubic root of 81269010 is about 433.1533289192.

The spelling of 81269010 in words is "eighty-one million, two hundred sixty-nine thousand, ten".