71628633549 has 36 divisors (see below), whose sum is σ = 116895753312. Its totient is φ = 41914303200.

The previous prime is 71628633541. The next prime is 71628633551. The reversal of 71628633549 is 94533682617.

71628633549 is a `hidden beast` number, since 7 + 1 + 6 + 286 + 3 + 354 + 9 = 666.

It is not a de Polignac number, because 71628633549 - 2³ = 71628633541 is a prime.

It is a super-2 number, since 2×71628633549² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71628633495 and 71628633504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71628633541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 346897 + ... + 513414.

Almost surely, 2^71628633549 is an apocalyptic number.

It is an amenable number.

71628633549 is a deficient number, since it is larger than the sum of its proper divisors (45267119763).

71628633549 is a wasteful number, since it uses less digits than its factorization.

71628633549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860386 (or 860354 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 71628633549 in words is "seventy-one billion, six hundred twenty-eight million, six hundred thirty-three thousand, five hundred forty-nine".