1275435956081 has 8 divisors (see below), whose sum is σ = 1464549345984. Its totient is φ = 1088049629520.

The previous prime is 1275435956077. The next prime is 1275435956087. The reversal of 1275435956081 is 1806595345721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1275435956081 - 2² = 1275435956077 is a prime.

It is a super-2 number, since 2×1275435956081² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275435956087) 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, 431764250 + ... + 431767203.

It is an arithmetic number, because the mean of its divisors is an integer number (183068668248).

It is a 1-persistent number, because it is pandigital, but 2⋅1275435956081 = 2550871912162 is not.

Almost surely, 2^{1275435956081} is an apocalyptic number.

It is an amenable number.

1275435956081 is a deficient number, since it is larger than the sum of its proper divisors (189113389903).

1275435956081 is an equidigital number, since it uses as much as digits as its factorization.

1275435956081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 863531671.

The product of its (nonzero) digits is 9072000, while the sum is 56.

The spelling of 1275435956081 in words is "one trillion, two hundred seventy-five billion, four hundred thirty-five million, nine hundred fifty-six thousand, eighty-one".