127888787640 has 64 divisors (see below), whose sum is σ = 394035737760. Its totient is φ = 33181954560.

The previous prime is 127888787557. The next prime is 127888787647. The reversal of 127888787640 is 46787888721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127888787647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14397451 + ... + 14406330.

Almost surely, 2^127888787640 is an apocalyptic number.

127888787640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127888787640 is an abundant number, since it is smaller than the sum of its proper divisors (266146950120).

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

127888787640 is a wasteful number, since it uses less digits than its factorization.

127888787640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28803832 (or 28803828 counting only the distinct ones).

The product of its (nonzero) digits is 67436544, while the sum is 66.

The spelling of 127888787640 in words is "one hundred twenty-seven billion, eight hundred eighty-eight million, seven hundred eighty-seven thousand, six hundred forty".