71540955691 has 8 divisors (see below), whose sum is σ = 73491972944. Its totient is φ = 69590858400.

The previous prime is 71540955679. The next prime is 71540955697. The reversal of 71540955691 is 19655904517.

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 71540955691 - 2²⁹ = 71004084779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71540955697) 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, 70860 + ... + 384841.

It is an arithmetic number, because the mean of its divisors is an integer number (9186496618).

Almost surely, 2^71540955691 is an apocalyptic number.

71540955691 is a deficient number, since it is larger than the sum of its proper divisors (1951017253).

71540955691 is a wasteful number, since it uses less digits than its factorization.

71540955691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459981.

The product of its (nonzero) digits is 1701000, while the sum is 52.

The spelling of 71540955691 in words is "seventy-one billion, five hundred forty million, nine hundred fifty-five thousand, six hundred ninety-one".