71227604628 has 36 divisors (see below), whose sum is σ = 180328499988. Its totient is φ = 23705487360.

The previous prime is 71227604611. The next prime is 71227604653. The reversal of 71227604628 is 82640672217.

It is a happy number.

71227604628 is a `hidden beast` number, since 7 + 12 + 2 + 7 + 6 + 0 + 4 + 628 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39936824964 + 31290779664 = 199842^2 + 176892^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×71227604628² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1520251 + ... + 1566402.

Almost surely, 2^71227604628 is an apocalyptic number.

It is an amenable number.

71227604628 is an abundant number, since it is smaller than the sum of its proper divisors (109100895360).

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

71227604628 is a wasteful number, since it uses less digits than its factorization.

71227604628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087304 (or 3087299 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The spelling of 71227604628 in words is "seventy-one billion, two hundred twenty-seven million, six hundred four thousand, six hundred twenty-eight".