1276606615551 has 16 divisors (see below), whose sum is σ = 1725666983040. Its totient is φ = 839344580640.

The previous prime is 1276606615541. The next prime is 1276606615597. The reversal of 1276606615551 is 1555166066721.

It is not a de Polignac number, because 1276606615551 - 2⁷ = 1276606615423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1276606615494 and 1276606615503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276606615541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4347256 + ... + 4631613.

It is an arithmetic number, because the mean of its divisors is an integer number (107854186440).

Almost surely, 2^{1276606615551} is an apocalyptic number.

1276606615551 is a deficient number, since it is larger than the sum of its proper divisors (449060367489).

1276606615551 is an equidigital number, since it uses as much as digits as its factorization.

1276606615551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979526.

The product of its (nonzero) digits is 2268000, while the sum is 51.

The spelling of 1276606615551 in words is "one trillion, two hundred seventy-six billion, six hundred six million, six hundred fifteen thousand, five hundred fifty-one".