1276455885385 has 16 divisors (see below), whose sum is σ = 1563499713600. Its totient is φ = 1000124959936.

The previous prime is 1276455885371. The next prime is 1276455885409. The reversal of 1276455885385 is 5835885546721.

It is a cyclic number.

It is not a de Polignac number, because 1276455885385 - 2¹¹ = 1276455883337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1276455885385.

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, 7963339 + ... + 8122048.

It is an arithmetic number, because the mean of its divisors is an integer number (97718732100).

Almost surely, 2^{1276455885385} is an apocalyptic number.

It is an amenable number.

1276455885385 is a deficient number, since it is larger than the sum of its proper divisors (287043828215).

1276455885385 is a wasteful number, since it uses less digits than its factorization.

1276455885385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16085720.

The product of its digits is 322560000, while the sum is 67.

The spelling of 1276455885385 in words is "one trillion, two hundred seventy-six billion, four hundred fifty-five million, eight hundred eighty-five thousand, three hundred eighty-five".