1658231642 has 32 divisors (see below), whose sum is σ = 2558267712. Its totient is φ = 805901184.

The previous prime is 1658231609. The next prime is 1658231647. The reversal of 1658231642 is 2461328561.

It is a junction number, because it is equal to n+sod(n) for n = 1658231596 and 1658231605.

It is not an unprimeable number, because it can be changed into a prime (1658231647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5401253 + ... + 5401559.

It is an arithmetic number, because the mean of its divisors is an integer number (79945866).

Almost surely, 2^1658231642 is an apocalyptic number.

1658231642 is a deficient number, since it is larger than the sum of its proper divisors (900036070).

1658231642 is a wasteful number, since it uses less digits than its factorization.

1658231642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782.

The product of its digits is 69120, while the sum is 38.

The square root of 1658231642 is about 40721.3904723304. The cubic root of 1658231642 is about 1183.6275521707.

The spelling of 1658231642 in words is "one billion, six hundred fifty-eight million, two hundred thirty-one thousand, six hundred forty-two".