1985355153 has 24 divisors (see below), whose sum is σ = 2945045376. Its totient is φ = 1288202400.

The previous prime is 1985355137. The next prime is 1985355161. The reversal of 1985355153 is 3515535891.

1985355153 is a `hidden beast` number, since 1 + 98 + 5 + 3 + 551 + 5 + 3 = 666.

It is not a de Polignac number, because 1985355153 - 2⁴ = 1985355137 is a prime.

It is a super-3 number, since 3×1985355153³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1985355099 and 1985355108.

It is not an unprimeable number, because it can be changed into a prime (1985351153) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63598 + ... + 89528.

It is an arithmetic number, because the mean of its divisors is an integer number (122710224).

Almost surely, 2^1985355153 is an apocalyptic number.

It is an amenable number.

1985355153 is a deficient number, since it is larger than the sum of its proper divisors (959690223).

1985355153 is a wasteful number, since it uses less digits than its factorization.

1985355153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26165 (or 26162 counting only the distinct ones).

The product of its digits is 405000, while the sum is 45.

The square root of 1985355153 is about 44557.3243474067. The cubic root of 1985355153 is about 1256.8382880087.

The spelling of 1985355153 in words is "one billion, nine hundred eighty-five million, three hundred fifty-five thousand, one hundred fifty-three".