120957728487 has 4 divisors (see below), whose sum is σ = 161276971320. Its totient is φ = 80638485656.

The previous prime is 120957728413. The next prime is 120957728497. The reversal of 120957728487 is 784827759021.

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

It is a cyclic number.

It is not a de Polignac number, because 120957728487 - 2²² = 120953534183 is a prime.

It is a super-2 number, since 2×120957728487² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 120957728487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120957728497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20159621412 + ... + 20159621417.

It is an arithmetic number, because the mean of its divisors is an integer number (40319242830).

Almost surely, 2^120957728487 is an apocalyptic number.

120957728487 is a deficient number, since it is larger than the sum of its proper divisors (40319242833).

120957728487 is an equidigital number, since it uses as much as digits as its factorization.

120957728487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40319242832.

The product of its (nonzero) digits is 15805440, while the sum is 60.

The spelling of 120957728487 in words is "one hundred twenty billion, nine hundred fifty-seven million, seven hundred twenty-eight thousand, four hundred eighty-seven".