71640611 has 8 divisors (see below), whose sum is σ = 82719840. Its totient is φ = 60772608.

The previous prime is 71640587. The next prime is 71640629. The reversal of 71640611 is 11604617.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71640611 - 2¹⁸ = 71378467 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71640661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52076 + ... + 53433.

It is an arithmetic number, because the mean of its divisors is an integer number (10339980).

Almost surely, 2^71640611 is an apocalyptic number.

71640611 is a deficient number, since it is larger than the sum of its proper divisors (11079229).

71640611 is a wasteful number, since it uses less digits than its factorization.

71640611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105613.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 71640611 is about 8464.0776815906. The cubic root of 71640611 is about 415.3234252370.

The spelling of 71640611 in words is "seventy-one million, six hundred forty thousand, six hundred eleven".