81148095 has 64 divisors (see below), whose sum is σ = 168791040. Its totient is φ = 36215424.

The previous prime is 81148091. The next prime is 81148099. The reversal of 81148095 is 59084118.

It is an interprime number because it is at equal distance from previous prime (81148091) and next prime (81148099).

It is not a de Polignac number, because 81148095 - 2² = 81148091 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81148091) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39637 + ... + 41633.

It is an arithmetic number, because the mean of its divisors is an integer number (2637360).

Almost surely, 2^81148095 is an apocalyptic number.

81148095 is an abundant number, since it is smaller than the sum of its proper divisors (87642945).

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

81148095 is a wasteful number, since it uses less digits than its factorization.

81148095 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2055 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 81148095 is about 9008.2237427808. The cubic root of 81148095 is about 432.9384018465.

The spelling of 81148095 in words is "eighty-one million, one hundred forty-eight thousand, ninety-five".