81146495 has 8 divisors (see below), whose sum is σ = 100733760. Its totient is φ = 62678560.

The previous prime is 81146489. The next prime is 81146497. The reversal of 81146495 is 59464118.

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

It is not a de Polignac number, because 81146495 - 2⁴ = 81146479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81146497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279671 + ... + 279960.

It is an arithmetic number, because the mean of its divisors is an integer number (12591720).

Almost surely, 2^81146495 is an apocalyptic number.

81146495 is a deficient number, since it is larger than the sum of its proper divisors (19587265).

81146495 is a wasteful number, since it uses less digits than its factorization.

81146495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559665.

The product of its digits is 34560, while the sum is 38.

The square root of 81146495 is about 9008.1349346022. The cubic root of 81146495 is about 432.9355564070.

The spelling of 81146495 in words is "eighty-one million, one hundred forty-six thousand, four hundred ninety-five".