11372820457 has 2 divisors, whose sum is σ = 11372820458.
Its totient is φ = 11372820456.
The previous prime is 11372820421. The next prime is 11372820461. The reversal of 11372820457 is 75402827311.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 10720324521 + 652495936 = 103539^2 + 25544^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-11372820457 is a prime.
It is not a weakly prime, because it can be changed into another prime (11372820857) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5686410228 + 5686410229.
It is an arithmetic number, because the mean of its divisors is an integer number (5686410229).
Almost surely, 211372820457 is an apocalyptic number.
It is an amenable number.
11372820457 is a deficient number, since it is larger than the sum of its proper divisors (1).
11372820457 is an equidigital number, since it uses as much as digits as its factorization.
11372820457 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 94080, while the sum is 40.
The spelling of 11372820457 in words is "eleven billion, three hundred seventy-two million, eight hundred twenty thousand, four hundred fifty-seven".