3491861864 has 16 divisors (see below), whose sum is σ = 6550952100. Its totient is φ = 1744941312.

The previous prime is 3491861803. The next prime is 3491861869. The reversal of 3491861864 is 4681681943.

It can be written as a sum of positive squares in 2 ways, for example, as 3368873764 + 122988100 = 58042^2 + 11090^2 .

It is not an unprimeable number, because it can be changed into a prime (3491861869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108599 + ... + 137030.

Almost surely, 2^3491861864 is an apocalyptic number.

It is an amenable number.

3491861864 is a deficient number, since it is larger than the sum of its proper divisors (3059090236).

3491861864 is a wasteful number, since it uses less digits than its factorization.

3491861864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247412 (or 247408 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 3491861864 is about 59091.9780004021. The cubic root of 3491861864 is about 1517.1168024978.

The spelling of 3491861864 in words is "three billion, four hundred ninety-one million, eight hundred sixty-one thousand, eight hundred sixty-four".