861948841744 has 15 divisors (see below), whose sum is σ = 1670033076103. Its totient is φ = 430972564048.

The previous prime is 861948841711. The next prime is 861948841753. The reversal of 861948841744 is 447148849168.

The square root of 861948841744 is 928412.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 3597597 + ... + 3829699.

Almost surely, 2^861948841744 is an apocalyptic number.

861948841744 is the 928412-nd square number.

It is an amenable number.

861948841744 is a deficient number, since it is larger than the sum of its proper divisors (808084234359).

861948841744 is an frugal number, since it uses more digits than its factorization.

861948841744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464214 (or 232105 counting only the distinct ones).

The product of its digits is 49545216, while the sum is 64.

Multiplying 861948841744 by its sum of digits (64), we get a square (55164725871616 = 7427296²).

The spelling of 861948841744 in words is "eight hundred sixty-one billion, nine hundred forty-eight million, eight hundred forty-one thousand, seven hundred forty-four".