127777400961 has 8 divisors (see below), whose sum is σ = 194708420544. Its totient is φ = 73015657680.

The previous prime is 127777400957. The next prime is 127777400963. The reversal of 127777400961 is 169004777721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 127777400961 - 2² = 127777400957 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (127777400963) 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, 3042319050 + ... + 3042319091.

It is an arithmetic number, because the mean of its divisors is an integer number (24338552568).

Almost surely, 2^127777400961 is an apocalyptic number.

It is an amenable number.

127777400961 is a deficient number, since it is larger than the sum of its proper divisors (66931019583).

127777400961 is an equidigital number, since it uses as much as digits as its factorization.

127777400961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6084638151.

The product of its (nonzero) digits is 1037232, while the sum is 51.

The spelling of 127777400961 in words is "one hundred twenty-seven billion, seven hundred seventy-seven million, four hundred thousand, nine hundred sixty-one".