861019496 has 16 divisors (see below), whose sum is σ = 1616163300. Its totient is φ = 430042624.

The previous prime is 861019463. The next prime is 861019547. The reversal of 861019496 is 694910168.

It can be written as a sum of positive squares in 2 ways, for example, as 724363396 + 136656100 = 26914^2 + 11690^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50495 + ... + 65358.

Almost surely, 2^861019496 is an apocalyptic number.

It is an amenable number.

861019496 is a deficient number, since it is larger than the sum of its proper divisors (755143804).

861019496 is a wasteful number, since it uses less digits than its factorization.

861019496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116788 (or 116784 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 861019496 is about 29343.1337113131. The cubic root of 861019496 is about 951.3441714498.

The spelling of 861019496 in words is "eight hundred sixty-one million, nineteen thousand, four hundred ninety-six".