71138973378 has 32 divisors (see below), whose sum is σ = 156024963072. Its totient is φ = 21444395600.

The previous prime is 71138973377. The next prime is 71138973391. The reversal of 71138973378 is 87337983117.

It is not an unprimeable number, because it can be changed into a prime (71138973377) 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, 2809026 + ... + 2834237.

It is an arithmetic number, because the mean of its divisors is an integer number (4875780096).

Almost surely, 2^71138973378 is an apocalyptic number.

71138973378 is an abundant number, since it is smaller than the sum of its proper divisors (84885989694).

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

71138973378 is a wasteful number, since it uses less digits than its factorization.

71138973378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5643470.

The product of its digits is 5334336, while the sum is 57.

The spelling of 71138973378 in words is "seventy-one billion, one hundred thirty-eight million, nine hundred seventy-three thousand, three hundred seventy-eight".