1225578266644 has 48 divisors (see below), whose sum is σ = 2192213237760. Its totient is φ = 599422088160.

The previous prime is 1225578266641. The next prime is 1225578266657. The reversal of 1225578266644 is 4466628755221.

It is a super-2 number, since 2×1225578266644² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225578266641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11415687 + ... + 11522545.

It is an arithmetic number, because the mean of its divisors is an integer number (45671109120).

Almost surely, 2^{1225578266644} is an apocalyptic number.

It is an amenable number.

1225578266644 is a deficient number, since it is larger than the sum of its proper divisors (966634971116).

1225578266644 is a wasteful number, since it uses less digits than its factorization.

1225578266644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107308 (or 107306 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 58.

The spelling of 1225578266644 in words is "one trillion, two hundred twenty-five billion, five hundred seventy-eight million, two hundred sixty-six thousand, six hundred forty-four".