81464758 has 8 divisors (see below), whose sum is σ = 127510128. Its totient is φ = 38961384.

The previous prime is 81464743. The next prime is 81464759. The reversal of 81464758 is 85746418.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81464759) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 885441 + ... + 885532.

It is an arithmetic number, because the mean of its divisors is an integer number (15938766).

Almost surely, 2^81464758 is an apocalyptic number.

81464758 is a deficient number, since it is larger than the sum of its proper divisors (46045370).

81464758 is a wasteful number, since it uses less digits than its factorization.

81464758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770998.

The product of its digits is 215040, while the sum is 43.

The square root of 81464758 is about 9025.7829577273. The cubic root of 81464758 is about 433.5008205949.

The spelling of 81464758 in words is "eighty-one million, four hundred sixty-four thousand, seven hundred fifty-eight".