120742415545 has 4 divisors (see below), whose sum is σ = 144890898660. Its totient is φ = 96593932432.

The previous prime is 120742415539. The next prime is 120742415567. The reversal of 120742415545 is 545514247021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22564846656 + 98177568889 = 150216^2 + 313333^2 .

It is a cyclic number.

It is not a de Polignac number, because 120742415545 - 2¹⁵ = 120742382777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120742415498 and 120742415507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12074241550 + ... + 12074241559.

It is an arithmetic number, because the mean of its divisors is an integer number (36222724665).

Almost surely, 2^120742415545 is an apocalyptic number.

It is an amenable number.

120742415545 is a deficient number, since it is larger than the sum of its proper divisors (24148483115).

120742415545 is an equidigital number, since it uses as much as digits as its factorization.

120742415545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24148483114.

The product of its (nonzero) digits is 224000, while the sum is 40.

The spelling of 120742415545 in words is "one hundred twenty billion, seven hundred forty-two million, four hundred fifteen thousand, five hundred forty-five".