1225867577761 has 4 divisors (see below), whose sum is σ = 1225875279024. Its totient is φ = 1225859876500.

The previous prime is 1225867577749. The next prime is 1225867577777. The reversal of 1225867577761 is 1677757685221.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1225867577761 - 2²³ = 1225859189153 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1225867577693 and 1225867577702.

It is not an unprimeable number, because it can be changed into a prime (1225867577261) 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, 3606715 + ... + 3931936.

It is an arithmetic number, because the mean of its divisors is an integer number (306468819756).

Almost surely, 2^{1225867577761} is an apocalyptic number.

It is an amenable number.

1225867577761 is a deficient number, since it is larger than the sum of its proper divisors (7701263).

1225867577761 is an equidigital number, since it uses as much as digits as its factorization.

1225867577761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701262.

The product of its digits is 69148800, while the sum is 64.

The spelling of 1225867577761 in words is "one trillion, two hundred twenty-five billion, eight hundred sixty-seven million, five hundred seventy-seven thousand, seven hundred sixty-one".