79841570437 has 2 divisors, whose sum is σ = 79841570438. Its totient is φ = 79841570436.

The previous prime is 79841570359. The next prime is 79841570453. The reversal of 79841570437 is 73407514897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46911661281 + 32929909156 = 216591^2 + 181466^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79841570437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79841570737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39920785218 + 39920785219.

It is an arithmetic number, because the mean of its divisors is an integer number (39920785219).

Almost surely, 2^79841570437 is an apocalyptic number.

It is an amenable number.

79841570437 is a deficient number, since it is larger than the sum of its proper divisors (1).

79841570437 is an equidigital number, since it uses as much as digits as its factorization.

79841570437 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5927040, while the sum is 55.

The spelling of 79841570437 in words is "seventy-nine billion, eight hundred forty-one million, five hundred seventy thousand, four hundred thirty-seven".