1645162534451 has 4 divisors (see below), whose sum is σ = 1645165661832. Its totient is φ = 1645159407072.

The previous prime is 1645162534441. The next prime is 1645162534469. The reversal of 1645162534451 is 1544352615461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1645162534451 - 2¹⁴ = 1645162518067 is a prime.

It is a super-2 number, since 2×1645162534451² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1645162534396 and 1645162534405.

It is not an unprimeable number, because it can be changed into a prime (1645162534441) 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, 559766 + ... + 1898331.

It is an arithmetic number, because the mean of its divisors is an integer number (411291415458).

Almost surely, 2^{1645162534451} is an apocalyptic number.

1645162534451 is a deficient number, since it is larger than the sum of its proper divisors (3127381).

1645162534451 is an equidigital number, since it uses as much as digits as its factorization.

1645162534451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3127380.

The product of its digits is 1728000, while the sum is 47.

The spelling of 1645162534451 in words is "one trillion, six hundred forty-five billion, one hundred sixty-two million, five hundred thirty-four thousand, four hundred fifty-one".