71372477749 has 2 divisors, whose sum is σ = 71372477750. Its totient is φ = 71372477748.

The previous prime is 71372477717. The next prime is 71372477791. The reversal of 71372477749 is 94777427317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57016843524 + 14355634225 = 238782^2 + 119815^2 .

It is a cyclic number.

It is not a de Polignac number, because 71372477749 - 2⁵ = 71372477717 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71372477693 and 71372477702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71372477849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35686238874 + 35686238875.

It is an arithmetic number, because the mean of its divisors is an integer number (35686238875).

Almost surely, 2^71372477749 is an apocalyptic number.

It is an amenable number.

71372477749 is a deficient number, since it is larger than the sum of its proper divisors (1).

71372477749 is an equidigital number, since it uses as much as digits as its factorization.

71372477749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14521248, while the sum is 58.

The spelling of 71372477749 in words is "seventy-one billion, three hundred seventy-two million, four hundred seventy-seven thousand, seven hundred forty-nine".