861450855152 has 10 divisors (see below), whose sum is σ = 1669061031888. Its totient is φ = 430725427568.

The previous prime is 861450855143. The next prime is 861450855163. The reversal of 861450855152 is 251558054168.

It is a super-2 number, since 2×861450855152² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 861450855152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26920339208 + ... + 26920339239.

Almost surely, 2^861450855152 is an apocalyptic number.

It is an amenable number.

861450855152 is a deficient number, since it is larger than the sum of its proper divisors (807610176736).

861450855152 is a wasteful number, since it uses less digits than its factorization.

861450855152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53840678455 (or 53840678449 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 50.

The spelling of 861450855152 in words is "eight hundred sixty-one billion, four hundred fifty million, eight hundred fifty-five thousand, one hundred fifty-two".