71230297640 has 64 divisors (see below), whose sum is σ = 168923005200. Its totient is φ = 26990559232.

The previous prime is 71230297637. The next prime is 71230297667. The reversal of 71230297640 is 4679203217.

It can be written as a sum of positive squares in 8 ways, for example, as 58997495236 + 12232802404 = 242894^2 + 110602^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517817 + ... + 640776.

Almost surely, 2^71230297640 is an apocalyptic number.

It is an amenable number.

71230297640 is an abundant number, since it is smaller than the sum of its proper divisors (97692707560).

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

71230297640 is a wasteful number, since it uses less digits than its factorization.

71230297640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158686 (or 1158682 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 41.

The spelling of 71230297640 in words is "seventy-one billion, two hundred thirty million, two hundred ninety-seven thousand, six hundred forty".