8261863604 has 24 divisors (see below), whose sum is σ = 14909276928. Its totient is φ = 4003777440.

The previous prime is 8261863583. The next prime is 8261863627. The reversal of 8261863604 is 4063681628.

It is a super-2 number, since 2×8261863604² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193967 + ... + 232694.

It is an arithmetic number, because the mean of its divisors is an integer number (621219872).

Almost surely, 2^8261863604 is an apocalyptic number.

It is an amenable number.

8261863604 is a deficient number, since it is larger than the sum of its proper divisors (6647413324).

8261863604 is a wasteful number, since it uses less digits than its factorization.

8261863604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426815 (or 426813 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 8261863604 is about 90894.7941523606. The cubic root of 8261863604 is about 2021.5881054306.

The spelling of 8261863604 in words is "eight billion, two hundred sixty-one million, eight hundred sixty-three thousand, six hundred four".