1645026605242 has 16 divisors (see below), whose sum is σ = 2479327139232. Its totient is φ = 818584517520.

The previous prime is 1645026605239. The next prime is 1645026605311. The reversal of 1645026605242 is 2425066205461.

It is a happy number.

It is a super-2 number, since 2×1645026605242² (a number of 25 digits) contains 22 as substring.

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, 14827408 + ... + 14937940.

It is an arithmetic number, because the mean of its divisors is an integer number (154957946202).

Almost surely, 2^{1645026605242} is an apocalyptic number.

1645026605242 is a deficient number, since it is larger than the sum of its proper divisors (834300533990).

1645026605242 is a wasteful number, since it uses less digits than its factorization.

1645026605242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146013.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 1645026605242 in words is "one trillion, six hundred forty-five billion, twenty-six million, six hundred five thousand, two hundred forty-two".