71550428560 has 80 divisors (see below), whose sum is σ = 180224464896. Its totient is φ = 26260360704.

The previous prime is 71550428539. The next prime is 71550428581. The reversal of 71550428560 is 6582405517.

It is an interprime number because it is at equal distance from previous prime (71550428539) and next prime (71550428581).

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32304 + ... + 379663.

Almost surely, 2^71550428560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71550428560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90112232448).

71550428560 is an abundant number, since it is smaller than the sum of its proper divisors (108674036336).

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

71550428560 is a wasteful number, since it uses less digits than its factorization.

71550428560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412160 (or 412154 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 71550428560 in words is "seventy-one billion, five hundred fifty million, four hundred twenty-eight thousand, five hundred sixty".