7316821887157 has 2 divisors, whose sum is σ = 7316821887158. Its totient is φ = 7316821887156.

The previous prime is 7316821887121. The next prime is 7316821887191. The reversal of 7316821887157 is 7517881286137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4192956524241 + 3123865362916 = 2047671^2 + 1767446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7316821887157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7316821887107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3658410943578 + 3658410943579.

It is an arithmetic number, because the mean of its divisors is an integer number (3658410943579).

Almost surely, 2^{7316821887157} is an apocalyptic number.

It is an amenable number.

7316821887157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7316821887157 is an equidigital number, since it uses as much as digits as its factorization.

7316821887157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31610880, while the sum is 64.

The spelling of 7316821887157 in words is "seven trillion, three hundred sixteen billion, eight hundred twenty-one million, eight hundred eighty-seven thousand, one hundred fifty-seven".