1276164649428 has 48 divisors (see below), whose sum is σ = 2991333106944. Its totient is φ = 423445381120.

The previous prime is 1276164649387. The next prime is 1276164649429. The reversal of 1276164649428 is 8249464616721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276164649429) 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, 4427701 + ... + 4707107.

It is an arithmetic number, because the mean of its divisors is an integer number (62319439728).

Almost surely, 2^{1276164649428} is an apocalyptic number.

It is an amenable number.

1276164649428 is an abundant number, since it is smaller than the sum of its proper divisors (1715168457516).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1276164649428 is a wasteful number, since it uses less digits than its factorization.

1276164649428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281152 (or 281150 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 60.

The spelling of 1276164649428 in words is "one trillion, two hundred seventy-six billion, one hundred sixty-four million, six hundred forty-nine thousand, four hundred twenty-eight".