71454955221 has 20 divisors (see below), whose sum is σ = 114952227852. Its totient is φ = 43972279488.

The previous prime is 71454955211. The next prime is 71454955289. The reversal of 71454955221 is 12255945417.

71454955221 is a `hidden beast` number, since 71 + 4 + 5 + 4 + 9 + 552 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 3587411025 + 67867544196 = 59895^2 + 260514^2 .

It is not a de Polignac number, because 71454955221 - 2¹¹ = 71454953173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71454955211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 33928176 + ... + 33930281.

Almost surely, 2^71454955221 is an apocalyptic number.

It is an amenable number.

71454955221 is a deficient number, since it is larger than the sum of its proper divisors (43497272631).

71454955221 is a wasteful number, since it uses less digits than its factorization.

71454955221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67858482 (or 67858473 counting only the distinct ones).

The product of its digits is 504000, while the sum is 45.

The spelling of 71454955221 in words is "seventy-one billion, four hundred fifty-four million, nine hundred fifty-five thousand, two hundred twenty-one".