2145653065878 has 32 divisors (see below), whose sum is σ = 4904398254336. Its totient is φ = 613037684448.

The previous prime is 2145653065849. The next prime is 2145653065879. The reversal of 2145653065878 is 8785603565412.

It is a super-2 number, since 2×2145653065878² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145653065879) 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, 5720625 + ... + 6084147.

It is an arithmetic number, because the mean of its divisors is an integer number (153262445448).

Almost surely, 2^{2145653065878} is an apocalyptic number.

2145653065878 is an abundant number, since it is smaller than the sum of its proper divisors (2758745188458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145653065878 is a wasteful number, since it uses less digits than its factorization.

2145653065878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504068.

The product of its (nonzero) digits is 48384000, while the sum is 60.

The spelling of 2145653065878 in words is "two trillion, one hundred forty-five billion, six hundred fifty-three million, sixty-five thousand, eight hundred seventy-eight".