1275822778160 has 40 divisors (see below), whose sum is σ = 3390043383456. Its totient is φ = 437424952320.

The previous prime is 1275822778123. The next prime is 1275822778163. The reversal of 1275822778160 is 618772285721.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1275822778160² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 1275822778096 and 1275822778105.

It is not an unprimeable number, because it can be changed into a prime (1275822778163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1139126921 + ... + 1139128040.

Almost surely, 2^{1275822778160} is an apocalyptic number.

1275822778160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1275822778160 is an abundant number, since it is smaller than the sum of its proper divisors (2114220605296).

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

1275822778160 is a wasteful number, since it uses less digits than its factorization.

1275822778160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278254981 (or 2278254975 counting only the distinct ones).

The product of its (nonzero) digits is 5268480, while the sum is 56.

The spelling of 1275822778160 in words is "one trillion, two hundred seventy-five billion, eight hundred twenty-two million, seven hundred seventy-eight thousand, one hundred sixty".