1557986158 has 16 divisors (see below), whose sum is σ = 2477568384. Its totient is φ = 733488480.

The previous prime is 1557986153. The next prime is 1557986179. The reversal of 1557986158 is 8516897551.

It is a junction number, because it is equal to n+sod(n) for n = 1557986099 and 1557986108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1557986153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337285 + ... + 341872.

It is an arithmetic number, because the mean of its divisors is an integer number (154848024).

Almost surely, 2^1557986158 is an apocalyptic number.

1557986158 is a deficient number, since it is larger than the sum of its proper divisors (919582226).

1557986158 is a wasteful number, since it uses less digits than its factorization.

1557986158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679227.

The product of its digits is 3024000, while the sum is 55.

The square root of 1557986158 is about 39471.3333699281. Note that the first 4 decimals coincide. The cubic root of 1557986158 is about 1159.2787227351.

It can be divided in two parts, 1557 and 986158, that added together give a triangular number (987715 = T₁₄₀₅).

The spelling of 1557986158 in words is "one billion, five hundred fifty-seven million, nine hundred eighty-six thousand, one hundred fifty-eight".