601681013761 has 3 divisors (see below), whose sum is σ = 601681789443. Its totient is φ = 601680238080.

The previous prime is 601681013749. The next prime is 601681013767. The reversal of 601681013761 is 167310186106.

The square root of 601681013761 is 775681.

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.

It can be written as a sum of positive squares in only one way, i.e., 194585972161 + 407095041600 = 441119^2 + 638040^2 .

It is not a de Polignac number, because 601681013761 - 2²³ = 601672625153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (601681013767) 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, 387841 + ... + 1163521.

It is an arithmetic number, because the mean of its divisors is an integer number (200560596481).

Almost surely, 2^601681013761 is an apocalyptic number.

601681013761 is the 775681-st square number.

601681013761 is the 387841-st centered octagonal number.

It is an amenable number.

601681013761 is a deficient number, since it is larger than the sum of its proper divisors (775682).

601681013761 is an frugal number, since it uses more digits than its factorization.

601681013761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1551362 (or 775681 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

Adding to 601681013761 its reverse (167310186106), we get a palindrome (768991199867).

The spelling of 601681013761 in words is "six hundred one billion, six hundred eighty-one million, thirteen thousand, seven hundred sixty-one".