71909537144461 has 8 divisors (see below), whose sum is σ = 74260427811584. Its totient is φ = 69560598238560.

The previous prime is 71909537144447. The next prime is 71909537144477. The reversal of 71909537144461 is 16444173590917.

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

It is not a de Polignac number, because 71909537144461 - 2¹⁷ = 71909537013389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71909537144461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71909537144441) 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, 487865415 + ... + 488012788.

It is an arithmetic number, because the mean of its divisors is an integer number (9282553476448).

Almost surely, 2^{71909537144461} is an apocalyptic number.

It is an amenable number.

71909537144461 is a deficient number, since it is larger than the sum of its proper divisors (2350890667123).

71909537144461 is a wasteful number, since it uses less digits than its factorization.

71909537144461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975880611.

The product of its (nonzero) digits is 22861440, while the sum is 61.

The spelling of 71909537144461 in words is "seventy-one trillion, nine hundred nine billion, five hundred thirty-seven million, one hundred forty-four thousand, four hundred sixty-one".