1275127637640 has 32 divisors (see below), whose sum is σ = 3825382913280. Its totient is φ = 340034036672.

The previous prime is 1275127637527. The next prime is 1275127637647. The reversal of 1275127637640 is 467367215721.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1275127637647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5313031704 + ... + 5313031943.

It is an arithmetic number, because the mean of its divisors is an integer number (119543216040).

Almost surely, 2^{1275127637640} is an apocalyptic number.

1275127637640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275127637640 is an abundant number, since it is smaller than the sum of its proper divisors (2550255275640).

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

1275127637640 is a wasteful number, since it uses less digits than its factorization.

1275127637640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10626063661 (or 10626063657 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 1275127637640 in words is "one trillion, two hundred seventy-five billion, one hundred twenty-seven million, six hundred thirty-seven thousand, six hundred forty".