120642878447 has 32 divisors (see below), whose sum is σ = 149586877440. Its totient is φ = 94747080960.

The previous prime is 120642878387. The next prime is 120642878479. The reversal of 120642878447 is 744878246021.

It is a happy number.

It is not a de Polignac number, because 120642878447 - 2¹⁰ = 120642877423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120642875447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6716204 + ... + 6734142.

It is an arithmetic number, because the mean of its divisors is an integer number (4674589920).

Almost surely, 2^120642878447 is an apocalyptic number.

120642878447 is a deficient number, since it is larger than the sum of its proper divisors (28943998993).

120642878447 is a wasteful number, since it uses less digits than its factorization.

120642878447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18503.

The product of its (nonzero) digits is 4816896, while the sum is 53.

The spelling of 120642878447 in words is "one hundred twenty billion, six hundred forty-two million, eight hundred seventy-eight thousand, four hundred forty-seven".