1620135135 has 16 divisors (see below), whose sum is σ = 2880240480. Its totient is φ = 864072000.

The previous prime is 1620135119. The next prime is 1620135137. The reversal of 1620135135 is 5315310261.

1620135135 is a `hidden beast` number, since 1 + 620 + 1 + 3 + 5 + 1 + 35 = 666.

It is not a de Polignac number, because 1620135135 - 2⁴ = 1620135119 is a prime.

It is a super-2 number, since 2×1620135135² = 5249675711322936450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

1620135135 is a modest number, since divided by 135135 gives 1620 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1620135099 and 1620135108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1620135137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6000366 + ... + 6000635.

It is an arithmetic number, because the mean of its divisors is an integer number (180015030).

Almost surely, 2^1620135135 is an apocalyptic number.

1620135135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1620135135 is a deficient number, since it is larger than the sum of its proper divisors (1260105345).

1620135135 is a wasteful number, since it uses less digits than its factorization.

1620135135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12001015 (or 12001009 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 1620135135 is about 40250.9022880233. The cubic root of 1620135135 is about 1174.4929479636.

Adding to 1620135135 its reverse (5315310261), we get a palindrome (6935445396).

The spelling of 1620135135 in words is "one billion, six hundred twenty million, one hundred thirty-five thousand, one hundred thirty-five".