1276001516671 has 12 divisors (see below), whose sum is σ = 1535512030920. Its totient is φ = 1056001254000.

The previous prime is 1276001516639. The next prime is 1276001516687. The reversal of 1276001516671 is 1766151006721.

It is a happy number.

It is not a de Polignac number, because 1276001516671 - 2⁵ = 1276001516639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276001516171) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448978705 + ... + 448981546.

It is an arithmetic number, because the mean of its divisors is an integer number (127959335910).

Almost surely, 2^{1276001516671} is an apocalyptic number.

1276001516671 is a deficient number, since it is larger than the sum of its proper divisors (259510514249).

1276001516671 is an equidigital number, since it uses as much as digits as its factorization.

1276001516671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897960294 (or 897960287 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 43.

The spelling of 1276001516671 in words is "one trillion, two hundred seventy-six billion, one million, five hundred sixteen thousand, six hundred seventy-one".