70324371581 has 2 divisors, whose sum is σ = 70324371582. Its totient is φ = 70324371580.

The previous prime is 70324371499. The next prime is 70324371583. The reversal of 70324371581 is 18517342307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59385303481 + 10939068100 = 243691^2 + 104590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70324371581 is a prime.

It is a super-2 number, since 2×70324371581² (a number of 22 digits) contains 22 as substring.

Together with 70324371583, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70324371583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35162185790 + 35162185791.

It is an arithmetic number, because the mean of its divisors is an integer number (35162185791).

Almost surely, 2^70324371581 is an apocalyptic number.

It is an amenable number.

70324371581 is a deficient number, since it is larger than the sum of its proper divisors (1).

70324371581 is an equidigital number, since it uses as much as digits as its factorization.

70324371581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 70324371581 in words is "seventy billion, three hundred twenty-four million, three hundred seventy-one thousand, five hundred eighty-one".