71213677621521 has 8 divisors (see below), whose sum is σ = 94962445419744. Its totient is φ = 47470347452160.

The previous prime is 71213677621481. The next prime is 71213677621531. The reversal of 71213677621521 is 12512677631217.

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

It is not a de Polignac number, because 71213677621521 - 2¹⁰ = 71213677620497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71213677621531) 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, 1359376656 + ... + 1359429041.

It is an arithmetic number, because the mean of its divisors is an integer number (11870305677468).

Almost surely, 2^{71213677621521} is an apocalyptic number.

It is an amenable number.

71213677621521 is a deficient number, since it is larger than the sum of its proper divisors (23748767798223).

71213677621521 is a wasteful number, since it uses less digits than its factorization.

71213677621521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2718814431.

The product of its digits is 1481760, while the sum is 51.

The spelling of 71213677621521 in words is "seventy-one trillion, two hundred thirteen billion, six hundred seventy-seven million, six hundred twenty-one thousand, five hundred twenty-one".