145416401645 has 4 divisors (see below), whose sum is σ = 174499681980. Its totient is φ = 116333121312.

The previous prime is 145416401591. The next prime is 145416401707. The reversal of 145416401645 is 546104614541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546104614541 = 719 ⋅759533539.

It can be written as a sum of positive squares in 2 ways, for example, as 26795398249 + 118621003396 = 163693^2 + 344414^2 .

It is a cyclic number.

It is not a de Polignac number, because 145416401645 - 2¹⁰ = 145416400621 is a prime.

It is a super-3 number, since 3×145416401645³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 14541640160 + ... + 14541640169.

It is an arithmetic number, because the mean of its divisors is an integer number (43624920495).

Almost surely, 2^145416401645 is an apocalyptic number.

It is an amenable number.

145416401645 is a deficient number, since it is larger than the sum of its proper divisors (29083280335).

145416401645 is an equidigital number, since it uses as much as digits as its factorization.

145416401645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29083280334.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 145416401645 in words is "one hundred forty-five billion, four hundred sixteen million, four hundred one thousand, six hundred forty-five".