81925595 has 8 divisors (see below), whose sum is σ = 98586720. Its totient is φ = 65356480.

The previous prime is 81925579. The next prime is 81925619. The reversal of 81925595 is 59552918.

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

It is not a de Polignac number, because 81925595 - 2⁴ = 81925579 is a prime.

It is a super-2 number, since 2×81925595² = 13423606232208050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21026 + ... + 24615.

It is an arithmetic number, because the mean of its divisors is an integer number (12323340).

Almost surely, 2^81925595 is an apocalyptic number.

81925595 is a deficient number, since it is larger than the sum of its proper divisors (16661125).

81925595 is a wasteful number, since it uses less digits than its factorization.

81925595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46005.

The product of its digits is 162000, while the sum is 44.

The square root of 81925595 is about 9051.2758769137. The cubic root of 81925595 is about 434.3167059083.

The spelling of 81925595 in words is "eighty-one million, nine hundred twenty-five thousand, five hundred ninety-five".