6564120403 has 2 divisors, whose sum is σ = 6564120404. Its totient is φ = 6564120402.

The previous prime is 6564120401. The next prime is 6564120463. The reversal of 6564120403 is 3040214656.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6564120403 - 2¹ = 6564120401 is a prime.

Together with 6564120401, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (6564120401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282060201 + 3282060202.

It is an arithmetic number, because the mean of its divisors is an integer number (3282060202).

Almost surely, 2^6564120403 is an apocalyptic number.

6564120403 is a deficient number, since it is larger than the sum of its proper divisors (1).

6564120403 is an equidigital number, since it uses as much as digits as its factorization.

6564120403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6564120403 is about 81019.2594572426. The cubic root of 6564120403 is about 1872.3721792508.

The spelling of 6564120403 in words is "six billion, five hundred sixty-four million, one hundred twenty thousand, four hundred three".