81607495 has 8 divisors (see below), whose sum is σ = 98899200. Its totient is φ = 64639200.

The previous prime is 81607483. The next prime is 81607499. The reversal of 81607495 is 59470618.

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

It is not a de Polignac number, because 81607495 - 2⁹ = 81606983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81607499) 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, 80295 + ... + 81304.

It is an arithmetic number, because the mean of its divisors is an integer number (12362400).

Almost surely, 2^81607495 is an apocalyptic number.

81607495 is a deficient number, since it is larger than the sum of its proper divisors (17291705).

81607495 is a wasteful number, since it uses less digits than its factorization.

81607495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161705.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 81607495 is about 9033.6866782062. The cubic root of 81607495 is about 433.7538564050.

The spelling of 81607495 in words is "eighty-one million, six hundred seven thousand, four hundred ninety-five".