3520406643 has 16 divisors (see below), whose sum is σ = 5162497536. Its totient is φ = 2120309280.

The previous prime is 3520406639. The next prime is 3520406647. The reversal of 3520406643 is 3466040253.

3520406643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3520406639) and next prime (3520406647).

It is not a de Polignac number, because 3520406643 - 2² = 3520406639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3520406647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958453 + ... + 962118.

It is an arithmetic number, because the mean of its divisors is an integer number (322656096).

Almost surely, 2^3520406643 is an apocalyptic number.

3520406643 is a deficient number, since it is larger than the sum of its proper divisors (1642090893).

3520406643 is a wasteful number, since it uses less digits than its factorization.

3520406643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1920634.

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 3520406643 is about 59333.0147809801. The cubic root of 3520406643 is about 1521.2395594732.

Adding to 3520406643 its reverse (3466040253), we get a palindrome (6986446896).

The spelling of 3520406643 in words is "three billion, five hundred twenty million, four hundred six thousand, six hundred forty-three".