1645252422025 has 48 divisors (see below), whose sum is σ = 2111245728768. Its totient is φ = 1270529568000.

The previous prime is 1645252422017. The next prime is 1645252422053. The reversal of 1645252422025 is 5202242525461.

It is not a de Polignac number, because 1645252422025 - 2³ = 1645252422017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 705207759 + ... + 705210091.

It is an arithmetic number, because the mean of its divisors is an integer number (43984286016).

Almost surely, 2^{1645252422025} is an apocalyptic number.

It is an amenable number.

1645252422025 is a deficient number, since it is larger than the sum of its proper divisors (465993306743).

1645252422025 is a wasteful number, since it uses less digits than its factorization.

1645252422025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4282 (or 4277 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 40.

Adding to 1645252422025 its reverse (5202242525461), we get a palindrome (6847494947486).

The spelling of 1645252422025 in words is "one trillion, six hundred forty-five billion, two hundred fifty-two million, four hundred twenty-two thousand, twenty-five".