81163962 has 48 divisors (see below), whose sum is σ = 196324128. Its totient is φ = 24020640.

The previous prime is 81163939. The next prime is 81163993. The reversal of 81163962 is 26936118.

81163962 is a `hidden beast` number, since 8 + 11 + 639 + 6 + 2 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3748 + ... + 13280.

It is an arithmetic number, because the mean of its divisors is an integer number (4090086).

Almost surely, 2^81163962 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81163962, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98162064).

81163962 is an abundant number, since it is smaller than the sum of its proper divisors (115160166).

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

81163962 is a wasteful number, since it uses less digits than its factorization.

81163962 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9595 (or 9592 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 81163962 is about 9009.1043949995. The cubic root of 81163962 is about 432.9666176904.

The spelling of 81163962 in words is "eighty-one million, one hundred sixty-three thousand, nine hundred sixty-two".