55011599987 has 2 divisors, whose sum is σ = 55011599988. Its totient is φ = 55011599986.

The previous prime is 55011599983. The next prime is 55011600023. The reversal of 55011599987 is 78999511055.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55011599987 - 2² = 55011599983 is a prime.

It is a super-2 number, since 2×55011599987² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55011599983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27505799993 + 27505799994.

It is an arithmetic number, because the mean of its divisors is an integer number (27505799994).

Almost surely, 2^55011599987 is an apocalyptic number.

55011599987 is a deficient number, since it is larger than the sum of its proper divisors (1).

55011599987 is an equidigital number, since it uses as much as digits as its factorization.

55011599987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103000, while the sum is 59.

The spelling of 55011599987 in words is "fifty-five billion, eleven million, five hundred ninety-nine thousand, nine hundred eighty-seven".