1275684622561 has 8 divisors (see below), whose sum is σ = 1331351049600. Its totient is φ = 1220035018752.

The previous prime is 1275684622547. The next prime is 1275684622579. The reversal of 1275684622561 is 1652264865721.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1275684622561 - 2²¹ = 1275682525409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275684623561) 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, 4050720 + ... + 4354273.

It is an arithmetic number, because the mean of its divisors is an integer number (166418881200).

Almost surely, 2^{1275684622561} is an apocalyptic number.

It is an amenable number.

1275684622561 is a deficient number, since it is larger than the sum of its proper divisors (55666427039).

1275684622561 is an equidigital number, since it uses as much as digits as its factorization.

1275684622561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8411615.

The product of its digits is 9676800, while the sum is 55.

The spelling of 1275684622561 in words is "one trillion, two hundred seventy-five billion, six hundred eighty-four million, six hundred twenty-two thousand, five hundred sixty-one".