1556466479 has 2 divisors, whose sum is σ = 1556466480. Its totient is φ = 1556466478.

The previous prime is 1556466403. The next prime is 1556466487. The reversal of 1556466479 is 9746646551.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1556466479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1556466479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1556466979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778233239 + 778233240.

It is an arithmetic number, because the mean of its divisors is an integer number (778233240).

Almost surely, 2^1556466479 is an apocalyptic number.

1556466479 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556466479 is an equidigital number, since it uses as much as digits as its factorization.

1556466479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5443200, while the sum is 53.

The square root of 1556466479 is about 39452.0782595797. The cubic root of 1556466479 is about 1158.9016751735.

The spelling of 1556466479 in words is "one billion, five hundred fifty-six million, four hundred sixty-six thousand, four hundred seventy-nine".