861692619076 has 9 divisors (see below), whose sum is σ = 1507965332349. Its totient is φ = 430845381264.

The previous prime is 861692619061. The next prime is 861692619121. The reversal of 861692619076 is 670916296168.

The square root of 861692619076 is 928274.

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

It can be written as a sum of positive squares in only one way, i.e., 347569202500 + 514123416576 = 589550^2 + 717024^2 .

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, 1624480 + ... + 2088616.

Almost surely, 2^861692619076 is an apocalyptic number.

861692619076 is the 928274-th square number.

It is an amenable number.

861692619076 is a deficient number, since it is larger than the sum of its proper divisors (646272713273).

861692619076 is an frugal number, since it uses more digits than its factorization.

861692619076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928278 (or 464139 counting only the distinct ones).

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 861692619076 in words is "eight hundred sixty-one billion, six hundred ninety-two million, six hundred nineteen thousand, seventy-six".