1227680197920 has 192 divisors, whose sum is σ = 4687506391680. Its totient is φ = 297619430400.

The previous prime is 1227680197787. The next prime is 1227680197943. The reversal of 1227680197920 is 297910867221.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12869991 + ... + 12965030.

It is an arithmetic number, because the mean of its divisors is an integer number (24414095790).

Almost surely, 2^{1227680197920} is an apocalyptic number.

1227680197920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227680197920 is an abundant number, since it is smaller than the sum of its proper divisors (3459826193760).

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

1227680197920 is a wasteful number, since it uses less digits than its factorization.

1227680197920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25835056 (or 25835042 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 1227680197920 in words is "one trillion, two hundred twenty-seven billion, six hundred eighty million, one hundred ninety-seven thousand, nine hundred twenty".