181630906074 has 24 divisors (see below), whose sum is σ = 396364812480. Its totient is φ = 60108068808.

The previous prime is 181630906073. The next prime is 181630906109. The reversal of 181630906074 is 470609036181.

It is a happy number.

181630906074 is a `hidden beast` number, since 1 + 8 + 1 + 6 + 30 + 9 + 0 + 607 + 4 = 666.

181630906074 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (181630906073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36294642 + ... + 36299645.

It is an arithmetic number, because the mean of its divisors is an integer number (16515200520).

Almost surely, 2^181630906074 is an apocalyptic number.

181630906074 is an abundant number, since it is smaller than the sum of its proper divisors (214733906406).

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

181630906074 is a wasteful number, since it uses less digits than its factorization.

181630906074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72594434 (or 72594431 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 181630906074 in words is "one hundred eighty-one billion, six hundred thirty million, nine hundred six thousand, seventy-four".