126979602178 has 32 divisors (see below), whose sum is σ = 225859596480. Its totient is φ = 52780215360.

The previous prime is 126979602121. The next prime is 126979602179. The reversal of 126979602178 is 871206979621.

It is a super-2 number, since 2×126979602178² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126979602179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2044093 + ... + 2105296.

It is an arithmetic number, because the mean of its divisors is an integer number (7058112390).

Almost surely, 2^126979602178 is an apocalyptic number.

126979602178 is a deficient number, since it is larger than the sum of its proper divisors (98879994302).

126979602178 is a wasteful number, since it uses less digits than its factorization.

126979602178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4149522.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The spelling of 126979602178 in words is "one hundred twenty-six billion, nine hundred seventy-nine million, six hundred two thousand, one hundred seventy-eight".