127640929394 has 24 divisors (see below), whose sum is σ = 212813935740. Its totient is φ = 57366700160.

The previous prime is 127640929391. The next prime is 127640929453. The reversal of 127640929394 is 493929046721.

It can be written as a sum of positive squares in 2 ways, for example, as 126887701369 + 753228025 = 356213^2 + 27445^2 .

It is not an unprimeable number, because it can be changed into a prime (127640929391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2941619 + ... + 2984694.

Almost surely, 2^127640929394 is an apocalyptic number.

127640929394 is a deficient number, since it is larger than the sum of its proper divisors (85173006346).

127640929394 is a wasteful number, since it uses less digits than its factorization.

127640929394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5926426 (or 5926415 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 127640929394 in words is "one hundred twenty-seven billion, six hundred forty million, nine hundred twenty-nine thousand, three hundred ninety-four".