1276529040040 has 80 divisors (see below), whose sum is σ = 2974834350180. Its totient is φ = 492993392640.

The previous prime is 1276529040037. The next prime is 1276529040047. The reversal of 1276529040040 is 400409256721.

It can be written as a sum of positive squares in 10 ways, for example, as 124938213156 + 1151590826884 = 353466^2 + 1073122^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 1276529039975 and 1276529040002.

It is not an unprimeable number, because it can be changed into a prime (1276529040047) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28268680 + ... + 28313800.

Almost surely, 2^{1276529040040} is an apocalyptic number.

1276529040040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276529040040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1487417175090).

1276529040040 is an abundant number, since it is smaller than the sum of its proper divisors (1698305310140).

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

1276529040040 is an frugal number, since it uses more digits than its factorization.

1276529040040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45248 (or 45157 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 1276529040040 in words is "one trillion, two hundred seventy-six billion, five hundred twenty-nine million, forty thousand, forty".