1645933490445 has 16 divisors (see below), whose sum is σ = 2788404972480. Its totient is φ = 826194065664.

The previous prime is 1645933490431. The next prime is 1645933490473. The reversal of 1645933490445 is 5440943395461.

It is a happy number.

It is not a de Polignac number, because 1645933490445 - 2⁶ = 1645933490381 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3227320315 + ... + 3227320824.

It is an arithmetic number, because the mean of its divisors is an integer number (174275310780).

Almost surely, 2^{1645933490445} is an apocalyptic number.

1645933490445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1645933490445 is a deficient number, since it is larger than the sum of its proper divisors (1142471482035).

1645933490445 is a wasteful number, since it uses less digits than its factorization.

1645933490445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454641164.

The product of its (nonzero) digits is 27993600, while the sum is 57.

The spelling of 1645933490445 in words is "one trillion, six hundred forty-five billion, nine hundred thirty-three million, four hundred ninety thousand, four hundred forty-five".