1556706049 has 2 divisors, whose sum is σ = 1556706050. Its totient is φ = 1556706048.

The previous prime is 1556706023. The next prime is 1556706059. The reversal of 1556706049 is 9406076551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1087680400 + 469025649 = 32980^2 + 21657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1556706049 - 2²¹ = 1554608897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556705996 and 1556706014.

It is not a weakly prime, because it can be changed into another prime (1556706059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778353024 + 778353025.

It is an arithmetic number, because the mean of its divisors is an integer number (778353025).

Almost surely, 2^1556706049 is an apocalyptic number.

It is an amenable number.

1556706049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1556706049 is an equidigital number, since it uses as much as digits as its factorization.

1556706049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 43.

The square root of 1556706049 is about 39455.1143579638. The cubic root of 1556706049 is about 1158.9611311773.

The spelling of 1556706049 in words is "one billion, five hundred fifty-six million, seven hundred six thousand, forty-nine".