1556654049 has 6 divisors (see below), whose sum is σ = 2248500306. Its totient is φ = 1037769360.

The previous prime is 1556654041. The next prime is 1556654063. The reversal of 1556654049 is 9404566551.

1556654049 is a `hidden beast` number, since 1 + 5 + 5 + 66 + 540 + 49 = 666.

1556654049 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 986399649 + 570254400 = 31407^2 + 23880^2 .

It is not a de Polignac number, because 1556654049 - 2³ = 1556654041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1556653995 and 1556654013.

It is not an unprimeable number, because it can be changed into a prime (1556654041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86480772 + ... + 86480789.

It is an arithmetic number, because the mean of its divisors is an integer number (374750051).

Almost surely, 2^1556654049 is an apocalyptic number.

It is an amenable number.

1556654049 is a deficient number, since it is larger than the sum of its proper divisors (691846257).

1556654049 is a wasteful number, since it uses less digits than its factorization.

1556654049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172961567 (or 172961564 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 45.

The square root of 1556654049 is about 39454.4553757874. The cubic root of 1556654049 is about 1158.9482264396.

The spelling of 1556654049 in words is "one billion, five hundred fifty-six million, six hundred fifty-four thousand, forty-nine".