1865041642 has 16 divisors (see below), whose sum is σ = 2828133000. Its totient is φ = 922383360.

The previous prime is 1865041621. The next prime is 1865041663. The reversal of 1865041642 is 2461405681.

It is an interprime number because it is at equal distance from previous prime (1865041621) and next prime (1865041663).

It can be written as a sum of positive squares in 4 ways, for example, as 1157428441 + 707613201 = 34021^2 + 26601^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 58834 + ... + 84802.

Almost surely, 2^1865041642 is an apocalyptic number.

1865041642 is a deficient number, since it is larger than the sum of its proper divisors (963091358).

1865041642 is a wasteful number, since it uses less digits than its factorization.

1865041642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26361.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1865041642 is about 43186.1278884783. The cubic root of 1865041642 is about 1230.9191010879.

The spelling of 1865041642 in words is "one billion, eight hundred sixty-five million, forty-one thousand, six hundred forty-two".