2613402620921 has 2 divisors, whose sum is σ = 2613402620922. Its totient is φ = 2613402620920.

The previous prime is 2613402620903. The next prime is 2613402620947. The reversal of 2613402620921 is 1290262043162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2095722370921 + 517680250000 = 1447661^2 + 719500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2613402620921 is a prime.

It is not a weakly prime, because it can be changed into another prime (2613402622921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1306701310460 + 1306701310461.

It is an arithmetic number, because the mean of its divisors is an integer number (1306701310461).

Almost surely, 2^{2613402620921} is an apocalyptic number.

It is an amenable number.

2613402620921 is a deficient number, since it is larger than the sum of its proper divisors (1).

2613402620921 is an equidigital number, since it uses as much as digits as its factorization.

2613402620921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 38.

It can be divided in two parts, 2613402 and 620921, that added together give a palindrome (3234323).

The spelling of 2613402620921 in words is "two trillion, six hundred thirteen billion, four hundred two million, six hundred twenty thousand, nine hundred twenty-one".