3658545401645 has 4 divisors (see below), whose sum is σ = 4390254481980. Its totient is φ = 2926836321312.

The previous prime is 3658545401611. The next prime is 3658545401669. The reversal of 3658545401645 is 5461045458563.

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

It can be written as a sum of positive squares in 2 ways, for example, as 470270892169 + 3188274509476 = 685763^2 + 1785574^2 .

It is a cyclic number.

It is not a de Polignac number, because 3658545401645 - 2³⁴ = 3641365532461 is a prime.

It is a super-3 number, since 3×3658545401645³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365854540160 + ... + 365854540169.

It is an arithmetic number, because the mean of its divisors is an integer number (1097563620495).

Almost surely, 2^{3658545401645} is an apocalyptic number.

It is an amenable number.

3658545401645 is a deficient number, since it is larger than the sum of its proper divisors (731709080335).

3658545401645 is an equidigital number, since it uses as much as digits as its factorization.

3658545401645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731709080334.

The product of its (nonzero) digits is 34560000, while the sum is 56.

The spelling of 3658545401645 in words is "three trillion, six hundred fifty-eight billion, five hundred forty-five million, four hundred one thousand, six hundred forty-five".