1276765121772 has 36 divisors (see below), whose sum is σ = 3688432574736. Its totient is φ = 364790034720.

The previous prime is 1276765121771. The next prime is 1276765121783. The reversal of 1276765121772 is 2771215676721.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1276765121771) 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, 2533263879 + ... + 2533264382.

Almost surely, 2^{1276765121772} is an apocalyptic number.

1276765121772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1276765121772 is an abundant number, since it is smaller than the sum of its proper divisors (2411667452964).

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

1276765121772 is a wasteful number, since it uses less digits than its factorization.

1276765121772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066528278 (or 5066528273 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 54.

The spelling of 1276765121772 in words is "one trillion, two hundred seventy-six billion, seven hundred sixty-five million, one hundred twenty-one thousand, seven hundred seventy-two".