861155956748 has 6 divisors (see below), whose sum is σ = 1507022924316. Its totient is φ = 430577978372.

The previous prime is 861155956721. The next prime is 861155956757. The reversal of 861155956748 is 847659551168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107644494590 + ... + 107644494597.

It is an arithmetic number, because the mean of its divisors is an integer number (251170487386).

Almost surely, 2^861155956748 is an apocalyptic number.

It is an amenable number.

861155956748 is a deficient number, since it is larger than the sum of its proper divisors (645866967568).

861155956748 is a wasteful number, since it uses less digits than its factorization.

861155956748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215288989191 (or 215288989189 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 65.

The spelling of 861155956748 in words is "eight hundred sixty-one billion, one hundred fifty-five million, nine hundred fifty-six thousand, seven hundred forty-eight".