127661268740 has 24 divisors (see below), whose sum is σ = 268099722072. Its totient is φ = 51062401280.

The previous prime is 127661268727. The next prime is 127661268797. The reversal of 127661268740 is 47862166721.

It can be written as a sum of positive squares in 4 ways, for example, as 77793019396 + 49868249344 = 278914^2 + 223312^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422210 + ... + 658470.

It is an arithmetic number, because the mean of its divisors is an integer number (11170821753).

Almost surely, 2^127661268740 is an apocalyptic number.

127661268740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127661268740 is an abundant number, since it is smaller than the sum of its proper divisors (140438453332).

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

127661268740 is a wasteful number, since it uses less digits than its factorization.

127661268740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263287 (or 263285 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 50.

The spelling of 127661268740 in words is "one hundred twenty-seven billion, six hundred sixty-one million, two hundred sixty-eight thousand, seven hundred forty".