127639921290 has 32 divisors (see below), whose sum is σ = 350098070400. Its totient is φ = 29174839104.

The previous prime is 127639921261. The next prime is 127639921319. The reversal of 127639921290 is 92129936721.

It is an interprime number because it is at equal distance from previous prime (127639921261) and next prime (127639921319).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303904365 + ... + 303904784.

It is an arithmetic number, because the mean of its divisors is an integer number (10940564700).

Almost surely, 2^127639921290 is an apocalyptic number.

127639921290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127639921290 is an abundant number, since it is smaller than the sum of its proper divisors (222458149110).

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

127639921290 is a wasteful number, since it uses less digits than its factorization.

127639921290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607809166.

The product of its (nonzero) digits is 734832, while the sum is 51.

The spelling of 127639921290 in words is "one hundred twenty-seven billion, six hundred thirty-nine million, nine hundred twenty-one thousand, two hundred ninety".