71680378756438 has 32 divisors (see below), whose sum is σ = 107818614077760. Its totient is φ = 35740982463360.

The previous prime is 71680378756433. The next prime is 71680378756439. The reversal of 71680378756438 is 83465787308617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71680378756433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10496464408 + ... + 10496471236.

It is an arithmetic number, because the mean of its divisors is an integer number (3369331689930).

Almost surely, 2^{71680378756438} is an apocalyptic number.

71680378756438 is a deficient number, since it is larger than the sum of its proper divisors (36138235321322).

71680378756438 is a wasteful number, since it uses less digits than its factorization.

71680378756438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15192.

The product of its (nonzero) digits is 1137991680, while the sum is 73.

The spelling of 71680378756438 in words is "seventy-one trillion, six hundred eighty billion, three hundred seventy-eight million, seven hundred fifty-six thousand, four hundred thirty-eight".