1222456621640 has 64 divisors (see below), whose sum is σ = 2763297678960. Its totient is φ = 486717235200.

The previous prime is 1222456621627. The next prime is 1222456621643. The reversal of 1222456621640 is 461266542221.

It can be written as a sum of positive squares in 8 ways, for example, as 296870240164 + 925586381476 = 544858^2 + 962074^2 .

It is not an unprimeable number, because it can be changed into a prime (1222456621643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8026034 + ... + 8176926.

Almost surely, 2^{1222456621640} is an apocalyptic number.

1222456621640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222456621640 is an abundant number, since it is smaller than the sum of its proper divisors (1540841057320).

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

1222456621640 is a wasteful number, since it uses less digits than its factorization.

1222456621640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151842 (or 151838 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

The spelling of 1222456621640 in words is "one trillion, two hundred twenty-two billion, four hundred fifty-six million, six hundred twenty-one thousand, six hundred forty".