1645273357602 has 48 divisors (see below), whose sum is σ = 3830001589152. Its totient is φ = 469805132160.

The previous prime is 1645273357577. The next prime is 1645273357643. The reversal of 1645273357602 is 2067533725461.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1117399 + ... + 2130522.

It is an arithmetic number, because the mean of its divisors is an integer number (79791699774).

Almost surely, 2^{1645273357602} is an apocalyptic number.

1645273357602 is an abundant number, since it is smaller than the sum of its proper divisors (2184728231550).

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

1645273357602 is a wasteful number, since it uses less digits than its factorization.

1645273357602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3249663 (or 3249656 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 51.

The spelling of 1645273357602 in words is "one trillion, six hundred forty-five billion, two hundred seventy-three million, three hundred fifty-seven thousand, six hundred two".