85552990387 has 2 divisors, whose sum is σ = 85552990388. Its totient is φ = 85552990386.

The previous prime is 85552990363. The next prime is 85552990421. The reversal of 85552990387 is 78309925558.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85552990387 - 2¹⁹ = 85552466099 is a prime.

It is a super-2 number, since 2×85552990387² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (85552990337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42776495193 + 42776495194.

It is an arithmetic number, because the mean of its divisors is an integer number (42776495194).

Almost surely, 2^85552990387 is an apocalyptic number.

85552990387 is a deficient number, since it is larger than the sum of its proper divisors (1).

85552990387 is an equidigital number, since it uses as much as digits as its factorization.

85552990387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216000, while the sum is 61.

The spelling of 85552990387 in words is "eighty-five billion, five hundred fifty-two million, nine hundred ninety thousand, three hundred eighty-seven".