1658561487 has 16 divisors (see below), whose sum is σ = 2517343488. Its totient is φ = 961484480.

The previous prime is 1658561467. The next prime is 1658561503. The reversal of 1658561487 is 7841658561.

It is not a de Polignac number, because 1658561487 - 2⁸ = 1658561231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1658561407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1091838 + ... + 1093355.

It is an arithmetic number, because the mean of its divisors is an integer number (157333968).

Almost surely, 2^1658561487 is an apocalyptic number.

1658561487 is a deficient number, since it is larger than the sum of its proper divisors (858782001).

1658561487 is a wasteful number, since it uses less digits than its factorization.

1658561487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2185230.

The product of its digits is 1612800, while the sum is 51.

The square root of 1658561487 is about 40725.4402922792. The cubic root of 1658561487 is about 1183.7060268817.

The spelling of 1658561487 in words is "one billion, six hundred fifty-eight million, five hundred sixty-one thousand, four hundred eighty-seven".