155544513139 has 2 divisors, whose sum is σ = 155544513140. Its totient is φ = 155544513138.

The previous prime is 155544513077. The next prime is 155544513167. The reversal of 155544513139 is 931315445551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155544513139 - 2⁷ = 155544513011 is a prime.

It is not a weakly prime, because it can be changed into another prime (155544511139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77772256569 + 77772256570.

It is an arithmetic number, because the mean of its divisors is an integer number (77772256570).

Almost surely, 2^155544513139 is an apocalyptic number.

155544513139 is a deficient number, since it is larger than the sum of its proper divisors (1).

155544513139 is an equidigital number, since it uses as much as digits as its factorization.

155544513139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 810000, while the sum is 46.

The spelling of 155544513139 in words is "one hundred fifty-five billion, five hundred forty-four million, five hundred thirteen thousand, one hundred thirty-nine".