155825967439 has 2 divisors, whose sum is σ = 155825967440. Its totient is φ = 155825967438.

The previous prime is 155825967373. The next prime is 155825967457. The reversal of 155825967439 is 934769528551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155825967439 - 2⁹ = 155825966927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155825961439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77912983719 + 77912983720.

It is an arithmetic number, because the mean of its divisors is an integer number (77912983720).

Almost surely, 2^155825967439 is an apocalyptic number.

155825967439 is a deficient number, since it is larger than the sum of its proper divisors (1).

155825967439 is an equidigital number, since it uses as much as digits as its factorization.

155825967439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648000, while the sum is 64.

The spelling of 155825967439 in words is "one hundred fifty-five billion, eight hundred twenty-five million, nine hundred sixty-seven thousand, four hundred thirty-nine".