2145656140252 has 6 divisors (see below), whose sum is σ = 3754898245448. Its totient is φ = 1072828070124.

The previous prime is 2145656140219. The next prime is 2145656140259. The reversal of 2145656140252 is 2520416565412.

It is a happy number.

It is a super-2 number, since 2×2145656140252² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2145656140199 and 2145656140208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145656140259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 268207017528 + ... + 268207017535.

Almost surely, 2^{2145656140252} is an apocalyptic number.

It is an amenable number.

2145656140252 is a deficient number, since it is larger than the sum of its proper divisors (1609242105196).

2145656140252 is a wasteful number, since it uses less digits than its factorization.

2145656140252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536414035067 (or 536414035065 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 2145656140252 in words is "two trillion, one hundred forty-five billion, six hundred fifty-six million, one hundred forty thousand, two hundred fifty-two".