81614378 has 16 divisors (see below), whose sum is σ = 126350304. Its totient is φ = 39508560.

The previous prime is 81614369. The next prime is 81614383. The reversal of 81614378 is 87341618.

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, 13001 + ... + 18227.

It is an arithmetic number, because the mean of its divisors is an integer number (7896894).

Almost surely, 2^81614378 is an apocalyptic number.

81614378 is a deficient number, since it is larger than the sum of its proper divisors (44735926).

81614378 is a wasteful number, since it uses less digits than its factorization.

81614378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477.

The product of its digits is 32256, while the sum is 38.

The square root of 81614378 is about 9034.0676331318. The cubic root of 81614378 is about 433.7660507256.

The spelling of 81614378 in words is "eighty-one million, six hundred fourteen thousand, three hundred seventy-eight".