1223680652401 has 3 divisors (see below), whose sum is σ = 1223681758603. Its totient is φ = 1223679546200.

The previous prime is 1223680652377. The next prime is 1223680652417. The reversal of 1223680652401 is 1042560863221.

The square root of 1223680652401 is 1106201.

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., 1216611206001 + 7069446400 = 1103001^2 + 84080^2 .

It is not a de Polignac number, because 1223680652401 - 2²¹ = 1223678555249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223680652471) 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, 553101 + ... + 1659301.

Almost surely, 2^{1223680652401} is an apocalyptic number.

1223680652401 is the 1106201-st square number.

1223680652401 is the 553101-st centered octagonal number.

It is an amenable number.

1223680652401 is a deficient number, since it is larger than the sum of its proper divisors (1106202).

1223680652401 is an frugal number, since it uses more digits than its factorization.

1223680652401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2212402 (or 1106201 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1223680652401 in words is "one trillion, two hundred twenty-three billion, six hundred eighty million, six hundred fifty-two thousand, four hundred one".