7421561364157 has 2 divisors, whose sum is σ = 7421561364158. Its totient is φ = 7421561364156.

The previous prime is 7421561364143. The next prime is 7421561364241. The reversal of 7421561364157 is 7514631651247.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4734253595556 + 2687307768601 = 2175834^2 + 1639301^2 .

It is a cyclic number.

It is not a de Polignac number, because 7421561364157 - 2²³ = 7421552975549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7421561361157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3710780682078 + 3710780682079.

It is an arithmetic number, because the mean of its divisors is an integer number (3710780682079).

Almost surely, 2^{7421561364157} is an apocalyptic number.

It is an amenable number.

7421561364157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7421561364157 is an equidigital number, since it uses as much as digits as its factorization.

7421561364157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4233600, while the sum is 52.

The spelling of 7421561364157 in words is "seven trillion, four hundred twenty-one billion, five hundred sixty-one million, three hundred sixty-four thousand, one hundred fifty-seven".