70381557437 has 2 divisors, whose sum is σ = 70381557438. Its totient is φ = 70381557436.

The previous prime is 70381557419. The next prime is 70381557439. The reversal of 70381557437 is 73475518307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69310566361 + 1070991076 = 263269^2 + 32726^2 .

It is a cyclic number.

It is not a de Polignac number, because 70381557437 - 2²⁴ = 70364780221 is a prime.

Together with 70381557439, 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 (70381557439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35190778718 + 35190778719.

It is an arithmetic number, because the mean of its divisors is an integer number (35190778719).

Almost surely, 2^70381557437 is an apocalyptic number.

It is an amenable number.

70381557437 is a deficient number, since it is larger than the sum of its proper divisors (1).

70381557437 is an equidigital number, since it uses as much as digits as its factorization.

70381557437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 70381557437 in words is "seventy billion, three hundred eighty-one million, five hundred fifty-seven thousand, four hundred thirty-seven".