81058626 has 36 divisors (see below), whose sum is σ = 193049766. Its totient is φ = 24562560.

The previous prime is 81058573. The next prime is 81058633. The reversal of 81058626 is 62685018.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70812225 + 10246401 = 8415^2 + 3201^2 .

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 16431 + ... + 20786.

Almost surely, 2^81058626 is an apocalyptic number.

81058626 is an abundant number, since it is smaller than the sum of its proper divisors (111991140).

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

81058626 is a wasteful number, since it uses less digits than its factorization.

81058626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37247 (or 37233 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 81058626 is about 9003.2564108771. The cubic root of 81058626 is about 432.7792327370.

The spelling of 81058626 in words is "eighty-one million, fifty-eight thousand, six hundred twenty-six".