861478874086 has 4 divisors (see below), whose sum is σ = 1292218311132. Its totient is φ = 430739437042.

The previous prime is 861478874071. The next prime is 861478874101. The reversal of 861478874086 is 680478874168.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (861478874071) and next prime (861478874101).

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, 215369718520 + ... + 215369718523.

It is an arithmetic number, because the mean of its divisors is an integer number (323054577783).

Almost surely, 2^861478874086 is an apocalyptic number.

861478874086 is a deficient number, since it is larger than the sum of its proper divisors (430739437046).

861478874086 is a wasteful number, since it uses less digits than its factorization.

861478874086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430739437045.

The product of its (nonzero) digits is 115605504, while the sum is 67.

The spelling of 861478874086 in words is "eight hundred sixty-one billion, four hundred seventy-eight million, eight hundred seventy-four thousand, eighty-six".