120440139985 has 16 divisors (see below), whose sum is σ = 157677365952. Its totient is φ = 87587121600.

The previous prime is 120440139983. The next prime is 120440139991. The reversal of 120440139985 is 589931044021.

It is not a de Polignac number, because 120440139985 - 2¹ = 120440139983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120440139983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 899407 + ... + 1024603.

It is an arithmetic number, because the mean of its divisors is an integer number (9854835372).

Almost surely, 2^120440139985 is an apocalyptic number.

It is an amenable number.

120440139985 is a deficient number, since it is larger than the sum of its proper divisors (37237225967).

120440139985 is a wasteful number, since it uses less digits than its factorization.

120440139985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142704.

The product of its (nonzero) digits is 311040, while the sum is 46.

The spelling of 120440139985 in words is "one hundred twenty billion, four hundred forty million, one hundred thirty-nine thousand, nine hundred eighty-five".