71642453879 has 2 divisors, whose sum is σ = 71642453880. Its totient is φ = 71642453878.

The previous prime is 71642453849. The next prime is 71642453893. The reversal of 71642453879 is 97835424617.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71642453879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71642453809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35821226939 + 35821226940.

It is an arithmetic number, because the mean of its divisors is an integer number (35821226940).

Almost surely, 2^71642453879 is an apocalyptic number.

71642453879 is a deficient number, since it is larger than the sum of its proper divisors (1).

71642453879 is an equidigital number, since it uses as much as digits as its factorization.

71642453879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 56.

It can be divided in two parts, 716424538 and 79, that added together give a palindrome (716424617).

The spelling of 71642453879 in words is "seventy-one billion, six hundred forty-two million, four hundred fifty-three thousand, eight hundred seventy-nine".