2145023455552 has 56 divisors (see below), whose sum is σ = 4323139456320. Its totient is φ = 1055751290880.

The previous prime is 2145023455499. The next prime is 2145023455571. The reversal of 2145023455552 is 2555543205412.

It is a super-2 number, since 2×2145023455552² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145023455499 and 2145023455508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5864277 + ... + 6219307.

Almost surely, 2^{2145023455552} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145023455552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2161569728160).

2145023455552 is an abundant number, since it is smaller than the sum of its proper divisors (2178116000768).

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

2145023455552 is a wasteful number, since it uses less digits than its factorization.

2145023455552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356519 (or 356509 counting only the distinct ones).

The product of its (nonzero) digits is 1200000, while the sum is 43.

The spelling of 2145023455552 in words is "two trillion, one hundred forty-five billion, twenty-three million, four hundred fifty-five thousand, five hundred fifty-two".