155011035221387 has 2 divisors, whose sum is σ = 155011035221388. Its totient is φ = 155011035221386.

The previous prime is 155011035221353. The next prime is 155011035221417. The reversal of 155011035221387 is 783122530110551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155011035221387 - 2³⁰ = 155009961479563 is a prime.

It is not a weakly prime, because it can be changed into another prime (155011035220387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77505517610693 + 77505517610694.

It is an arithmetic number, because the mean of its divisors is an integer number (77505517610694).

Almost surely, 2^{155011035221387} is an apocalyptic number.

155011035221387 is a deficient number, since it is larger than the sum of its proper divisors (1).

155011035221387 is an equidigital number, since it uses as much as digits as its factorization.

155011035221387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 44.

The spelling of 155011035221387 in words is "one hundred fifty-five trillion, eleven billion, thirty-five million, two hundred twenty-one thousand, three hundred eighty-seven".