1645055434829 has 4 divisors (see below), whose sum is σ = 1731637299840. Its totient is φ = 1558473569820.

The previous prime is 1645055434807. The next prime is 1645055434871. The reversal of 1645055434829 is 9284345505461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1645055434829 - 2²⁰ = 1645054386253 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1645055434129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43290932477 + ... + 43290932514.

It is an arithmetic number, because the mean of its divisors is an integer number (432909324960).

Almost surely, 2^{1645055434829} is an apocalyptic number.

1645055434829 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1645055434829 is a deficient number, since it is larger than the sum of its proper divisors (86581865011).

1645055434829 is an equidigital number, since it uses as much as digits as its factorization.

1645055434829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86581865010.

The product of its (nonzero) digits is 20736000, while the sum is 56.

The spelling of 1645055434829 in words is "one trillion, six hundred forty-five billion, fifty-five million, four hundred thirty-four thousand, eight hundred twenty-nine".