81676950 has 24 divisors (see below), whose sum is σ = 202559208. Its totient is φ = 21780480.

The previous prime is 81676949. The next prime is 81676981. The reversal of 81676950 is 5967618.

It is a super-2 number, since 2×81676950² = 13342248322605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 272107 + ... + 272406.

It is an arithmetic number, because the mean of its divisors is an integer number (8439967).

Almost surely, 2^81676950 is an apocalyptic number.

81676950 is an abundant number, since it is smaller than the sum of its proper divisors (120882258).

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

81676950 is a wasteful number, since it uses less digits than its factorization.

81676950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544528 (or 544523 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 81676950 is about 9037.5300829375. The cubic root of 81676950 is about 433.8768754628.

The spelling of 81676950 in words is "eighty-one million, six hundred seventy-six thousand, nine hundred fifty".