3420021662545 has 4 divisors (see below), whose sum is σ = 4104025995060. Its totient is φ = 2736017330032.

The previous prime is 3420021662537. The next prime is 3420021662557. The reversal of 3420021662545 is 5452661200243.

It is a happy number.

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 2665124815441 + 754896847104 = 1632521^2 + 868848^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420021662545 - 2³ = 3420021662537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3420021662498 and 3420021662507.

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, 342002166250 + ... + 342002166259.

It is an arithmetic number, because the mean of its divisors is an integer number (1026006498765).

Almost surely, 2^{3420021662545} is an apocalyptic number.

It is an amenable number.

3420021662545 is a deficient number, since it is larger than the sum of its proper divisors (684004332515).

3420021662545 is an equidigital number, since it uses as much as digits as its factorization.

3420021662545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684004332514.

The product of its (nonzero) digits is 345600, while the sum is 40.

Adding to 3420021662545 its reverse (5452661200243), we get a palindrome (8872682862788).

The spelling of 3420021662545 in words is "three trillion, four hundred twenty billion, twenty-one million, six hundred sixty-two thousand, five hundred forty-five".