1275915905400 has 48 divisors (see below), whose sum is σ = 3955339308600. Its totient is φ = 340244241280.

The previous prime is 1275915905399. The next prime is 1275915905443. The reversal of 1275915905400 is 45095195721.

It is a super-2 number, since 2×1275915905400² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1275915905400.

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 11 ways as a sum of consecutive naturals, for example, 1063262655 + ... + 1063263854.

Almost surely, 2^{1275915905400} is an apocalyptic number.

1275915905400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275915905400 is an abundant number, since it is smaller than the sum of its proper divisors (2679423403200).

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

1275915905400 is a wasteful number, since it uses less digits than its factorization.

1275915905400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2126526528 (or 2126526519 counting only the distinct ones).

The product of its (nonzero) digits is 567000, while the sum is 48.

The spelling of 1275915905400 in words is "one trillion, two hundred seventy-five billion, nine hundred fifteen million, nine hundred five thousand, four hundred".