1267609670945 has 4 divisors (see below), whose sum is σ = 1521131605140. Its totient is φ = 1014087736752.

The previous prime is 1267609670917. The next prime is 1267609670947. The reversal of 1267609670945 is 5490769067621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 303283706944 + 964325964001 = 550712^2 + 982001^2 .

It is a cyclic number.

It is not a de Polignac number, because 1267609670945 - 2⁶ = 1267609670881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1267609670947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126760967090 + ... + 126760967099.

It is an arithmetic number, because the mean of its divisors is an integer number (380282901285).

Almost surely, 2^{1267609670945} is an apocalyptic number.

It is an amenable number.

1267609670945 is a deficient number, since it is larger than the sum of its proper divisors (253521934195).

1267609670945 is an equidigital number, since it uses as much as digits as its factorization.

1267609670945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253521934194.

The product of its (nonzero) digits is 34292160, while the sum is 62.

The spelling of 1267609670945 in words is "one trillion, two hundred sixty-seven billion, six hundred nine million, six hundred seventy thousand, nine hundred forty-five".