71421453516 has 48 divisors (see below), whose sum is σ = 194344102400. Its totient is φ = 20406128400.

The previous prime is 71421453479. The next prime is 71421453517. The reversal of 71421453516 is 61535412417.

It is not an unprimeable number, because it can be changed into a prime (71421453517) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8671960 + ... + 8680191.

Almost surely, 2^71421453516 is an apocalyptic number.

It is an amenable number.

71421453516 is an abundant number, since it is smaller than the sum of its proper divisors (122922648884).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71421453516 is a wasteful number, since it uses less digits than its factorization.

71421453516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17352179 (or 17352163 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The spelling of 71421453516 in words is "seventy-one billion, four hundred twenty-one million, four hundred fifty-three thousand, five hundred sixteen".