71425378826 has 4 divisors (see below), whose sum is σ = 107138068242. Its totient is φ = 35712689412.

The previous prime is 71425378823. The next prime is 71425378837. The reversal of 71425378826 is 62887352417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62887352417 = 8821 ⋅7129277.

It can be written as a sum of positive squares in only one way, i.e., 66923103025 + 4502275801 = 258695^2 + 67099^2 .

It is not an unprimeable number, because it can be changed into a prime (71425378823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17856344705 + ... + 17856344708.

Almost surely, 2^71425378826 is an apocalyptic number.

71425378826 is a deficient number, since it is larger than the sum of its proper divisors (35712689416).

71425378826 is a wasteful number, since it uses less digits than its factorization.

71425378826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35712689415.

The product of its digits is 4515840, while the sum is 53.

The spelling of 71425378826 in words is "seventy-one billion, four hundred twenty-five million, three hundred seventy-eight thousand, eight hundred twenty-six".