1227542667640 has 64 divisors (see below), whose sum is σ = 2791801869120. Its totient is φ = 485740800000.

The previous prime is 1227542667623. The next prime is 1227542667647. The reversal of 1227542667640 is 467662457221.

It is a super-2 number, since 2×1227542667640² (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 (1227542667647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1033990 + ... + 1877290.

It is an arithmetic number, because the mean of its divisors is an integer number (43621904205).

Almost surely, 2^{1227542667640} is an apocalyptic number.

1227542667640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1227542667640 is an abundant number, since it is smaller than the sum of its proper divisors (1564259201480).

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

1227542667640 is a wasteful number, since it uses less digits than its factorization.

1227542667640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843704 (or 843700 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 52.

The spelling of 1227542667640 in words is "one trillion, two hundred twenty-seven billion, five hundred forty-two million, six hundred sixty-seven thousand, six hundred forty".