71642611 has 2 divisors, whose sum is σ = 71642612. Its totient is φ = 71642610.

The previous prime is 71642569. The next prime is 71642639. The reversal of 71642611 is 11624617.

It is an a-pointer prime, because the next prime (71642639) can be obtained adding 71642611 to its sum of digits (28).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71642611 - 2⁹ = 71642099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71642611.

It is not a weakly prime, because it can be changed into another prime (71642111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35821305 + 35821306.

It is an arithmetic number, because the mean of its divisors is an integer number (35821306).

Almost surely, 2^71642611 is an apocalyptic number.

71642611 is a deficient number, since it is larger than the sum of its proper divisors (1).

71642611 is an equidigital number, since it uses as much as digits as its factorization.

71642611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2016, while the sum is 28.

The square root of 71642611 is about 8464.1958271297. The cubic root of 71642611 is about 415.3272900799.

The spelling of 71642611 in words is "seventy-one million, six hundred forty-two thousand, six hundred eleven".