1225813349377 has 4 divisors (see below), whose sum is σ = 1225954142896. Its totient is φ = 1225672555860.

The previous prime is 1225813349347. The next prime is 1225813349393. The reversal of 1225813349377 is 7739433185221.

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 1225813349377 - 2¹¹ = 1225813347329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225813349347) 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, 70383699 + ... + 70401112.

It is an arithmetic number, because the mean of its divisors is an integer number (306488535724).

Almost surely, 2^{1225813349377} is an apocalyptic number.

It is an amenable number.

1225813349377 is a deficient number, since it is larger than the sum of its proper divisors (140793519).

1225813349377 is an equidigital number, since it uses as much as digits as its factorization.

1225813349377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140793518.

The product of its digits is 7620480, while the sum is 55.

The spelling of 1225813349377 in words is "one trillion, two hundred twenty-five billion, eight hundred thirteen million, three hundred forty-nine thousand, three hundred seventy-seven".