155552519987 has 2 divisors, whose sum is σ = 155552519988. Its totient is φ = 155552519986.

The previous prime is 155552519939. The next prime is 155552520007. The reversal of 155552519987 is 789915255551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155552519987 - 2¹⁸ = 155552257843 is a prime.

It is not a weakly prime, because it can be changed into another prime (155552519917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77776259993 + 77776259994.

It is an arithmetic number, because the mean of its divisors is an integer number (77776259994).

Almost surely, 2^155552519987 is an apocalyptic number.

155552519987 is a deficient number, since it is larger than the sum of its proper divisors (1).

155552519987 is an equidigital number, since it uses as much as digits as its factorization.

155552519987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28350000, while the sum is 62.

The spelling of 155552519987 in words is "one hundred fifty-five billion, five hundred fifty-two million, five hundred nineteen thousand, nine hundred eighty-seven".