1276529012945 has 16 divisors (see below), whose sum is σ = 1556752093248. Its totient is φ = 1004651968320.

The previous prime is 1276529012939. The next prime is 1276529012981. The reversal of 1276529012945 is 5492109256721.

It is not a de Polignac number, because 1276529012945 - 2⁴⁰ = 177017385169 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2263271 + ... + 2770460.

It is an arithmetic number, because the mean of its divisors is an integer number (97297005828).

Almost surely, 2^{1276529012945} is an apocalyptic number.

It is an amenable number.

1276529012945 is a deficient number, since it is larger than the sum of its proper divisors (280223080303).

1276529012945 is an equidigital number, since it uses as much as digits as its factorization.

1276529012945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5034560.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 1276529012945 in words is "one trillion, two hundred seventy-six billion, five hundred twenty-nine million, twelve thousand, nine hundred forty-five".