1225564622500 has 30 divisors (see below), whose sum is σ = 2680064721950. Its totient is φ = 490225848000.

The previous prime is 1225564622411. The next prime is 1225564622509. The reversal of 1225564622500 is 52264655221.

It can be written as a sum of positive squares in 5 ways, for example, as 150531584256 + 1075033038244 = 387984^2 + 1036838^2 .

It is not an unprimeable number, because it can be changed into a prime (1225564622509) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 245110425 + ... + 245115424.

Almost surely, 2^{1225564622500} is an apocalyptic number.

1225564622500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1225564622500 is an abundant number, since it is smaller than the sum of its proper divisors (1454500099450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225564622500 is an equidigital number, since it uses as much as digits as its factorization.

1225564622500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490225873 (or 490225856 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 40.

The spelling of 1225564622500 in words is "one trillion, two hundred twenty-five billion, five hundred sixty-four million, six hundred twenty-two thousand, five hundred".