127640376639 has 40 divisors (see below), whose sum is σ = 199134679392. Its totient is φ = 81323542080.

The previous prime is 127640376601. The next prime is 127640376727. The reversal of 127640376639 is 936673046721.

It is a happy number.

It is not a de Polignac number, because 127640376639 - 2¹³ = 127640368447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127640376139) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2171197 + ... + 2229209.

Almost surely, 2^127640376639 is an apocalyptic number.

127640376639 is a deficient number, since it is larger than the sum of its proper divisors (71494302753).

127640376639 is a wasteful number, since it uses less digits than its factorization.

127640376639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59229 (or 59220 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 54.

The spelling of 127640376639 in words is "one hundred twenty-seven billion, six hundred forty million, three hundred seventy-six thousand, six hundred thirty-nine".