120709835581 has 4 divisors (see below), whose sum is σ = 120711124000. Its totient is φ = 120708547164.

The previous prime is 120709835569. The next prime is 120709835611. The reversal of 120709835581 is 185538907021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120709835581 - 2⁵ = 120709835549 is a prime.

It is a super-2 number, since 2×120709835581² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120709839581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491631 + ... + 695068.

It is an arithmetic number, because the mean of its divisors is an integer number (30177781000).

Almost surely, 2^120709835581 is an apocalyptic number.

It is an amenable number.

120709835581 is a deficient number, since it is larger than the sum of its proper divisors (1288419).

120709835581 is a wasteful number, since it uses less digits than its factorization.

120709835581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288418.

The product of its (nonzero) digits is 604800, while the sum is 49.

The spelling of 120709835581 in words is "one hundred twenty billion, seven hundred nine million, eight hundred thirty-five thousand, five hundred eighty-one".