127051516811 has 4 divisors (see below), whose sum is σ = 129134328624. Its totient is φ = 124968705000.

The previous prime is 127051516777. The next prime is 127051516831. The reversal of 127051516811 is 118615150721.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 127051516811 - 2¹⁸ = 127051254667 is a prime.

It is a super-2 number, since 2×127051516811² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127051516831) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1041405815 + ... + 1041405936.

It is an arithmetic number, because the mean of its divisors is an integer number (32283582156).

Almost surely, 2^127051516811 is an apocalyptic number.

127051516811 is a deficient number, since it is larger than the sum of its proper divisors (2082811813).

127051516811 is an equidigital number, since it uses as much as digits as its factorization.

127051516811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2082811812.

The product of its (nonzero) digits is 16800, while the sum is 38.

The spelling of 127051516811 in words is "one hundred twenty-seven billion, fifty-one million, five hundred sixteen thousand, eight hundred eleven".