1655431198 has 4 divisors (see below), whose sum is σ = 2483146800. Its totient is φ = 827715598.

The previous prime is 1655431163. The next prime is 1655431199. The reversal of 1655431198 is 8911345561.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1655431199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413857798 + ... + 413857801.

It is an arithmetic number, because the mean of its divisors is an integer number (620786700).

Almost surely, 2^1655431198 is an apocalyptic number.

1655431198 is a deficient number, since it is larger than the sum of its proper divisors (827715602).

1655431198 is an equidigital number, since it uses as much as digits as its factorization.

1655431198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827715601.

The product of its digits is 129600, while the sum is 43.

The square root of 1655431198 is about 40686.9905252281. The cubic root of 1655431198 is about 1182.9608679943.

The spelling of 1655431198 in words is "one billion, six hundred fifty-five million, four hundred thirty-one thousand, one hundred ninety-eight".