81696050 has 48 divisors (see below), whose sum is σ = 161989632. Its totient is φ = 30547200.

The previous prime is 81696047. The next prime is 81696053. The reversal of 81696050 is 5069618.

It is an interprime number because it is at equal distance from previous prime (81696047) and next prime (81696053).

It is a super-3 number, since 3×81696050³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 81696050.

It is not an unprimeable number, because it can be changed into a prime (81696053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 189335 + ... + 189765.

It is an arithmetic number, because the mean of its divisors is an integer number (3374784).

Almost surely, 2^81696050 is an apocalyptic number.

81696050 is a deficient number, since it is larger than the sum of its proper divisors (80293582).

81696050 is a wasteful number, since it uses less digits than its factorization.

81696050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 678 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 81696050 is about 9038.5867258106. The cubic root of 81696050 is about 433.9106932553.

The spelling of 81696050 in words is "eighty-one million, six hundred ninety-six thousand, fifty".