127917587640 has 32 divisors (see below), whose sum is σ = 383752763280. Its totient is φ = 34111356672.

The previous prime is 127917587597. The next prime is 127917587641. The reversal of 127917587640 is 46785719721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127917587641) 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, 532989829 + ... + 532990068.

Almost surely, 2^127917587640 is an apocalyptic number.

127917587640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127917587640 is an abundant number, since it is smaller than the sum of its proper divisors (255835175640).

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

127917587640 is a wasteful number, since it uses less digits than its factorization.

127917587640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065979911 (or 1065979907 counting only the distinct ones).

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 127917587640 in words is "one hundred twenty-seven billion, nine hundred seventeen million, five hundred eighty-seven thousand, six hundred forty".