71630612 has 6 divisors (see below), whose sum is σ = 125353578. Its totient is φ = 35815304.

The previous prime is 71630591. The next prime is 71630617. The reversal of 71630612 is 21603617.

It can be written as a sum of positive squares in only one way, i.e., 71301136 + 329476 = 8444^2 + 574^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71630617) 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 as a sum of consecutive naturals, namely, 8953823 + ... + 8953830.

It is an arithmetic number, because the mean of its divisors is an integer number (20892263).

Almost surely, 2^71630612 is an apocalyptic number.

It is an amenable number.

71630612 is a deficient number, since it is larger than the sum of its proper divisors (53722966).

71630612 is a wasteful number, since it uses less digits than its factorization.

71630612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17907657 (or 17907655 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 71630612 is about 8463.4869882336. The cubic root of 71630612 is about 415.3041018761.

The spelling of 71630612 in words is "seventy-one million, six hundred thirty thousand, six hundred twelve".