1271074771640 has 32 divisors (see below), whose sum is σ = 2862863656560. Its totient is φ = 507906278400.

The previous prime is 1271074771639. The next prime is 1271074771643. The reversal of 1271074771640 is 461774701721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271074771643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16324121 + ... + 16401800.

Almost surely, 2^{1271074771640} is an apocalyptic number.

1271074771640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271074771640 is an abundant number, since it is smaller than the sum of its proper divisors (1591788884920).

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

1271074771640 is a wasteful number, since it uses less digits than its factorization.

1271074771640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32726903 (or 32726899 counting only the distinct ones).

The product of its (nonzero) digits is 460992, while the sum is 47.

The spelling of 1271074771640 in words is "one trillion, two hundred seventy-one billion, seventy-four million, seven hundred seventy-one thousand, six hundred forty".