127540778730 has 64 divisors (see below), whose sum is σ = 312876753408. Its totient is φ = 33258897920.

The previous prime is 127540778707. The next prime is 127540778749. The reversal of 127540778730 is 37877045721.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1644220 + ... + 1720040.

It is an arithmetic number, because the mean of its divisors is an integer number (4888699272).

Almost surely, 2^127540778730 is an apocalyptic number.

127540778730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 127540778730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (156438376704).

127540778730 is an abundant number, since it is smaller than the sum of its proper divisors (185335974678).

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

127540778730 is a wasteful number, since it uses less digits than its factorization.

127540778730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77071.

The product of its (nonzero) digits is 2304960, while the sum is 51.

The spelling of 127540778730 in words is "one hundred twenty-seven billion, five hundred forty million, seven hundred seventy-eight thousand, seven hundred thirty".