71912728553 has 2 divisors, whose sum is σ = 71912728554. Its totient is φ = 71912728552.

The previous prime is 71912728541. The next prime is 71912728567. The reversal of 71912728553 is 35582721917.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69512904409 + 2399824144 = 263653^2 + 48988^2 .

It is an emirp because it is prime and its reverse (35582721917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71912728553 - 2⁸ = 71912728297 is a prime.

It is a super-2 number, since 2×71912728553² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71912728753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35956364276 + 35956364277.

It is an arithmetic number, because the mean of its divisors is an integer number (35956364277).

Almost surely, 2^71912728553 is an apocalyptic number.

It is an amenable number.

71912728553 is a deficient number, since it is larger than the sum of its proper divisors (1).

71912728553 is an equidigital number, since it uses as much as digits as its factorization.

71912728553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1058400, while the sum is 50.

The spelling of 71912728553 in words is "seventy-one billion, nine hundred twelve million, seven hundred twenty-eight thousand, five hundred fifty-three".