81560952 has 64 divisors (see below), whose sum is σ = 247161600. Its totient is φ = 24714720.

The previous prime is 81560923. The next prime is 81560959. The reversal of 81560952 is 25906518.

It is a happy number.

81560952 is a `hidden beast` number, since 8 + 1 + 560 + 95 + 2 = 666.

It is a super-2 number, since 2×81560952² = 13304377782292608, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81560959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14788 + ... + 19539.

It is an arithmetic number, because the mean of its divisors is an integer number (3861900).

Almost surely, 2^81560952 is an apocalyptic number.

It is an amenable number.

81560952 is an abundant number, since it is smaller than the sum of its proper divisors (165600648).

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

81560952 is a wasteful number, since it uses less digits than its factorization.

81560952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34353 (or 34343 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 81560952 is about 9031.1102307524. The cubic root of 81560952 is about 433.6713801369.

The spelling of 81560952 in words is "eighty-one million, five hundred sixty thousand, nine hundred fifty-two".