71197966280 has 48 divisors (see below), whose sum is σ = 186349784220. Its totient is φ = 24410730624.

The previous prime is 71197966253. The next prime is 71197966291. The reversal of 71197966280 is 8266979117.

It can be written as a sum of positive squares in 2 ways, for example, as 65731729924 + 5466236356 = 256382^2 + 73934^2 .

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 18160787 + ... + 18164706.

Almost surely, 2^71197966280 is an apocalyptic number.

71197966280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

71197966280 is an abundant number, since it is smaller than the sum of its proper divisors (115151817940).

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

71197966280 is a wasteful number, since it uses less digits than its factorization.

71197966280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36325518 (or 36325507 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 56.

The spelling of 71197966280 in words is "seventy-one billion, one hundred ninety-seven million, nine hundred sixty-six thousand, two hundred eighty".