81676410 has 16 divisors (see below), whose sum is σ = 196023456. Its totient is φ = 21780368.

The previous prime is 81676409. The next prime is 81676423. The reversal of 81676410 is 1467618.

It is a happy number.

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, 1361244 + ... + 1361303.

It is an arithmetic number, because the mean of its divisors is an integer number (12251466).

Almost surely, 2^81676410 is an apocalyptic number.

81676410 is an abundant number, since it is smaller than the sum of its proper divisors (114347046).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81676410 is a wasteful number, since it uses less digits than its factorization.

81676410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722557.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 81676410 is about 9037.5002074689. The cubic root of 81676410 is about 433.8759192810.

The spelling of 81676410 in words is "eighty-one million, six hundred seventy-six thousand, four hundred ten".