120437455681 has 3 divisors (see below), whose sum is σ = 120437802723. Its totient is φ = 120437108640.

The previous prime is 120437455669. The next prime is 120437455711. The reversal of 120437455681 is 186554734021.

The square root of 120437455681 is 347041.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 186554734021 = 271393 ⋅687397.

It can be written as a sum of positive squares in only one way, i.e., 25918102081 + 94519353600 = 160991^2 + 307440^2 .

It is not a de Polignac number, because 120437455681 - 2²⁵ = 120403901249 is a prime.

It is a super-2 number, since 2×120437455681² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120437455601) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 173521 + ... + 520561.

It is an arithmetic number, because the mean of its divisors is an integer number (40145934241).

Almost surely, 2^120437455681 is an apocalyptic number.

120437455681 is the 347041-st square number.

120437455681 is the 173521-st centered octagonal number.

It is an amenable number.

120437455681 is a deficient number, since it is larger than the sum of its proper divisors (347042).

120437455681 is an frugal number, since it uses more digits than its factorization.

120437455681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694082 (or 347041 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 46.

The spelling of 120437455681 in words is "one hundred twenty billion, four hundred thirty-seven million, four hundred fifty-five thousand, six hundred eighty-one".