155015811611 has 2 divisors, whose sum is σ = 155015811612. Its totient is φ = 155015811610.

The previous prime is 155015811563. The next prime is 155015811649. The reversal of 155015811611 is 116118510551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155015811611 - 2¹⁸ = 155015549467 is a prime.

It is not a weakly prime, because it can be changed into another prime (155015811011) 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, 77507905805 + 77507905806.

It is an arithmetic number, because the mean of its divisors is an integer number (77507905806).

Almost surely, 2^155015811611 is an apocalyptic number.

155015811611 is a deficient number, since it is larger than the sum of its proper divisors (1).

155015811611 is an equidigital number, since it uses as much as digits as its factorization.

155015811611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 35.

The spelling of 155015811611 in words is "one hundred fifty-five billion, fifteen million, eight hundred eleven thousand, six hundred eleven".