1275906327380 has 12 divisors (see below), whose sum is σ = 2679403287540. Its totient is φ = 510362530944.

The previous prime is 1275906327337. The next prime is 1275906327461. The reversal of 1275906327380 is 837236095721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 318256196164 + 957650131216 = 564142^2 + 978596^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31897658165 + ... + 31897658204.

It is an arithmetic number, because the mean of its divisors is an integer number (223283607295).

Almost surely, 2^{1275906327380} is an apocalyptic number.

1275906327380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275906327380 is an abundant number, since it is smaller than the sum of its proper divisors (1403496960160).

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

1275906327380 is a wasteful number, since it uses less digits than its factorization.

1275906327380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63795316378 (or 63795316376 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

The spelling of 1275906327380 in words is "one trillion, two hundred seventy-five billion, nine hundred six million, three hundred twenty-seven thousand, three hundred eighty".