71072523461 has 2 divisors, whose sum is σ = 71072523462. Its totient is φ = 71072523460.

The previous prime is 71072523449. The next prime is 71072523493. The reversal of 71072523461 is 16432527017.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70599678436 + 472845025 = 265706^2 + 21745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71072523461 is a prime.

It is a super-2 number, since 2×71072523461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71072523061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35536261730 + 35536261731.

It is an arithmetic number, because the mean of its divisors is an integer number (35536261731).

Almost surely, 2^71072523461 is an apocalyptic number.

It is an amenable number.

71072523461 is a deficient number, since it is larger than the sum of its proper divisors (1).

71072523461 is an equidigital number, since it uses as much as digits as its factorization.

71072523461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 71072523461 in words is "seventy-one billion, seventy-two million, five hundred twenty-three thousand, four hundred sixty-one".