127640551711 has 2 divisors, whose sum is σ = 127640551712. Its totient is φ = 127640551710.

The previous prime is 127640551691. The next prime is 127640551723. The reversal of 127640551711 is 117155046721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127640551711 is a prime.

It is a super-2 number, since 2×127640551711² (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 (127640551781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63820275855 + 63820275856.

It is an arithmetic number, because the mean of its divisors is an integer number (63820275856).

Almost surely, 2^127640551711 is an apocalyptic number.

127640551711 is a deficient number, since it is larger than the sum of its proper divisors (1).

127640551711 is an equidigital number, since it uses as much as digits as its factorization.

127640551711 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58800, while the sum is 40.

The spelling of 127640551711 in words is "one hundred twenty-seven billion, six hundred forty million, five hundred fifty-one thousand, seven hundred eleven".