71478881280 has 132 divisors (see below), whose sum is σ = 247672621872. Its totient is φ = 19061022720.

The previous prime is 71478881273. The next prime is 71478881311. The reversal of 71478881280 is 8218887417.

It is a happy number.

71478881280 is a `hidden beast` number, since 7 + 1 + 478 + 88 + 12 + 80 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

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, 729516 + ... + 821675.

Almost surely, 2^71478881280 is an apocalyptic number.

It is an amenable number.

71478881280 is an abundant number, since it is smaller than the sum of its proper divisors (176193740592).

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

71478881280 is a wasteful number, since it uses less digits than its factorization.

71478881280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551222 (or 1551201 counting only the distinct ones).

The product of its (nonzero) digits is 1605632, while the sum is 54.

The spelling of 71478881280 in words is "seventy-one billion, four hundred seventy-eight million, eight hundred eighty-one thousand, two hundred eighty".