3425537207621 has 4 divisors (see below), whose sum is σ = 3426122875500. Its totient is φ = 3424951539744.

The previous prime is 3425537207591. The next prime is 3425537207623. The reversal of 3425537207621 is 1267027355243.

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 1167847648900 + 2257689558721 = 1080670^2 + 1502561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3425537207621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3425537207623) by changing a digit.

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, 292825166 + ... + 292836863.

It is an arithmetic number, because the mean of its divisors is an integer number (856530718875).

Almost surely, 2^{3425537207621} is an apocalyptic number.

It is an amenable number.

3425537207621 is a deficient number, since it is larger than the sum of its proper divisors (585667879).

3425537207621 is an equidigital number, since it uses as much as digits as its factorization.

3425537207621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585667878.

The product of its (nonzero) digits is 2116800, while the sum is 47.

The spelling of 3425537207621 in words is "three trillion, four hundred twenty-five billion, five hundred thirty-seven million, two hundred seven thousand, six hundred twenty-one".