81596463 has 8 divisors (see below), whose sum is σ = 117164208. Its totient is φ = 50213184.

The previous prime is 81596461. The next prime is 81596477. The reversal of 81596463 is 36469518.

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

It is not a de Polignac number, because 81596463 - 2¹ = 81596461 is a prime.

It is a super-2 number, since 2×81596463² = 13315965548220738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81596461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1046070 + ... + 1046147.

It is an arithmetic number, because the mean of its divisors is an integer number (14645526).

Almost surely, 2^81596463 is an apocalyptic number.

81596463 is a deficient number, since it is larger than the sum of its proper divisors (35567745).

81596463 is a wasteful number, since it uses less digits than its factorization.

81596463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2092233.

The product of its digits is 155520, while the sum is 42.

The square root of 81596463 is about 9033.0760541468. The cubic root of 81596463 is about 433.7343100460.

The spelling of 81596463 in words is "eighty-one million, five hundred ninety-six thousand, four hundred sixty-three".