127661723790 has 48 divisors (see below), whose sum is σ = 320288583888. Its totient is φ = 32562986368.

The previous prime is 127661723789. The next prime is 127661723807. The reversal of 127661723790 is 97327166721.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4006239 + ... + 4037978.

It is an arithmetic number, because the mean of its divisors is an integer number (6672678831).

Almost surely, 2^127661723790 is an apocalyptic number.

127661723790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127661723790 is an abundant number, since it is smaller than the sum of its proper divisors (192626860098).

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

127661723790 is a wasteful number, since it uses less digits than its factorization.

127661723790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8044273 (or 8044250 counting only the distinct ones).

The product of its (nonzero) digits is 1333584, while the sum is 51.

The spelling of 127661723790 in words is "one hundred twenty-seven billion, six hundred sixty-one million, seven hundred twenty-three thousand, seven hundred ninety".