1227299156440 has 96 divisors (see below), whose sum is σ = 3252929716800. Its totient is φ = 415461795840.

The previous prime is 1227299156429. The next prime is 1227299156441. The reversal of 1227299156440 is 446519927221.

It is a super-4 number, since 4×1227299156440⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1227299156441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3808281 + ... + 4117960.

It is an arithmetic number, because the mean of its divisors is an integer number (33884684550).

Almost surely, 2^{1227299156440} is an apocalyptic number.

1227299156440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227299156440 is an abundant number, since it is smaller than the sum of its proper divisors (2025630560360).

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

1227299156440 is a wasteful number, since it uses less digits than its factorization.

1227299156440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7926345 (or 7926334 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1227299156440 in words is "one trillion, two hundred twenty-seven billion, two hundred ninety-nine million, one hundred fifty-six thousand, four hundred forty".