1271813906880 has 168 divisors, whose sum is σ = 4772192755824. Its totient is φ = 308318515200.

The previous prime is 1271813906861. The next prime is 1271813906887. The reversal of 1271813906880 is 886093181721.

1271813906880 is a `hidden beast` number, since 12 + 7 + 181 + 390 + 68 + 8 + 0 = 666.

It is a super-2 number, since 2×1271813906880² (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 (1271813906887) 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, 20041141 + ... + 20104500.

Almost surely, 2^{1271813906880} is an apocalyptic number.

1271813906880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271813906880 is an abundant number, since it is smaller than the sum of its proper divisors (3500378848944).

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

1271813906880 is a wasteful number, since it uses less digits than its factorization.

1271813906880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40145675 (or 40145662 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The spelling of 1271813906880 in words is "one trillion, two hundred seventy-one billion, eight hundred thirteen million, nine hundred six thousand, eight hundred eighty".