127212663698 has 4 divisors (see below), whose sum is σ = 190818995550. Its totient is φ = 63606331848.

The previous prime is 127212663689. The next prime is 127212663709. The reversal of 127212663698 is 896366212721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 72604919209 + 54607744489 = 269453^2 + 233683^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31803165923 + ... + 31803165926.

Almost surely, 2^127212663698 is an apocalyptic number.

127212663698 is a deficient number, since it is larger than the sum of its proper divisors (63606331852).

127212663698 is an equidigital number, since it uses as much as digits as its factorization.

127212663698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63606331851.

The product of its digits is 2612736, while the sum is 53.

The spelling of 127212663698 in words is "one hundred twenty-seven billion, two hundred twelve million, six hundred sixty-three thousand, six hundred ninety-eight".