6461746786 has 20 divisors (see below), whose sum is σ = 10661864310. Its totient is φ = 2937144320.

The previous prime is 6461746763. The next prime is 6461746787. The reversal of 6461746786 is 6876471646.

It can be written as a sum of positive squares in only one way, i.e., 6281355025 + 180391761 = 79255^2 + 13431^2 .

It is not an unprimeable number, because it can be changed into a prime (6461746787) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 81055 + ... + 139618.

Almost surely, 2^6461746786 is an apocalyptic number.

6461746786 is a deficient number, since it is larger than the sum of its proper divisors (4200117524).

6461746786 is an equidigital number, since it uses as much as digits as its factorization.

6461746786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220719 (or 220686 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 55.

The square root of 6461746786 is about 80384.9910493246. The cubic root of 6461746786 is about 1862.5873332680.

The spelling of 6461746786 in words is "six billion, four hundred sixty-one million, seven hundred forty-six thousand, seven hundred eighty-six".