11621553373 has 2 divisors, whose sum is σ = 11621553374. Its totient is φ = 11621553372.

The previous prime is 11621553331. The next prime is 11621553403. The reversal of 11621553373 is 37335512611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11621486809 + 66564 = 107803^2 + 258^2 .

It is a cyclic number.

It is not a de Polignac number, because 11621553373 - 2¹³ = 11621545181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11621553173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5810776686 + 5810776687.

It is an arithmetic number, because the mean of its divisors is an integer number (5810776687).

Almost surely, 2^11621553373 is an apocalyptic number.

It is an amenable number.

11621553373 is a deficient number, since it is larger than the sum of its proper divisors (1).

11621553373 is an equidigital number, since it uses as much as digits as its factorization.

11621553373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The spelling of 11621553373 in words is "eleven billion, six hundred twenty-one million, five hundred fifty-three thousand, three hundred seventy-three".