871457865278 has 96 divisors (see below), whose sum is σ = 1771179207168. Its totient is φ = 312918914880.

The previous prime is 871457865193. The next prime is 871457865331. The reversal of 871457865278 is 872568754178.

Added to its reverse (872568754178) it gives a square (1744026619456 = 1320616²).

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14129375 + ... + 14190917.

It is an arithmetic number, because the mean of its divisors is an integer number (18449783408).

Almost surely, 2^871457865278 is an apocalyptic number.

871457865278 is an abundant number, since it is smaller than the sum of its proper divisors (899721341890).

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

871457865278 is a wasteful number, since it uses less digits than its factorization.

871457865278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62230 (or 62219 counting only the distinct ones).

The product of its digits is 210739200, while the sum is 68.

Adding to 871457865278 its reverse (872568754178), we get a square (1744026619456 = 1320616²).

Subtracting 871457865278 from its reverse (872568754178), we obtain a square (1110888900 = 33330²).

The spelling of 871457865278 in words is "eight hundred seventy-one billion, four hundred fifty-seven million, eight hundred sixty-five thousand, two hundred seventy-eight".