81611462 has 4 divisors (see below), whose sum is σ = 122417196. Its totient is φ = 40805730.

The previous prime is 81611459. The next prime is 81611471. The reversal of 81611462 is 26411618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26411618 = 2 ⋅13205809.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20402864 + ... + 20402867.

It is an arithmetic number, because the mean of its divisors is an integer number (30604299).

Almost surely, 2^81611462 is an apocalyptic number.

81611462 is a deficient number, since it is larger than the sum of its proper divisors (40805734).

81611462 is a wasteful number, since it uses less digits than its factorization.

81611462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40805733.

The product of its digits is 2304, while the sum is 29.

The square root of 81611462 is about 9033.9062425952. The cubic root of 81611462 is about 433.7608846552.

The spelling of 81611462 in words is "eighty-one million, six hundred eleven thousand, four hundred sixty-two".