1641645142 has 16 divisors (see below), whose sum is σ = 2522176272. Its totient is φ = 800956800.

The previous prime is 1641645121. The next prime is 1641645149. The reversal of 1641645142 is 2415461461.

It is a junction number, because it is equal to n+sod(n) for n = 1641645098 and 1641645107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1641645149) 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, 85642 + ... + 103042.

It is an arithmetic number, because the mean of its divisors is an integer number (157636017).

Almost surely, 2^1641645142 is an apocalyptic number.

1641645142 is a deficient number, since it is larger than the sum of its proper divisors (880531130).

1641645142 is a wasteful number, since it uses less digits than its factorization.

1641645142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18543.

The product of its digits is 23040, while the sum is 34.

The square root of 1641645142 is about 40517.2203143305. The cubic root of 1641645142 is about 1179.6678999350.

The spelling of 1641645142 in words is "one billion, six hundred forty-one million, six hundred forty-five thousand, one hundred forty-two".