2145665353 has 8 divisors (see below), whose sum is σ = 2446641288. Its totient is φ = 1864107264.

The previous prime is 2145665351. The next prime is 2145665363. The reversal of 2145665353 is 3535665412.

It can be written as a sum of positive squares in 4 ways, for example, as 1327104 + 2144338249 = 1152^2 + 46307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145665353 - 2¹ = 2145665351 is a prime.

It is a super-2 number, since 2×2145665353² = 9207759614129229218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2145665351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4854226 + ... + 4854667.

It is an arithmetic number, because the mean of its divisors is an integer number (305830161).

Almost surely, 2^2145665353 is an apocalyptic number.

It is an amenable number.

2145665353 is a deficient number, since it is larger than the sum of its proper divisors (300975935).

2145665353 is a wasteful number, since it uses less digits than its factorization.

2145665353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9708923.

The product of its digits is 324000, while the sum is 40.

The square root of 2145665353 is about 46321.3271938532. The cubic root of 2145665353 is about 1289.7949222299.

The spelling of 2145665353 in words is "two billion, one hundred forty-five million, six hundred sixty-five thousand, three hundred fifty-three".