6461502464 has 22 divisors (see below), whose sum is σ = 12916696914. Its totient is φ = 3230750720.

The previous prime is 6461502407. The next prime is 6461502479. The reversal of 6461502464 is 4642051646.

It can be written as a sum of positive squares in only one way, i.e., 4650148864 + 1811353600 = 68192^2 + 42560^2 .

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, 3154007 + ... + 3156054.

It is an arithmetic number, because the mean of its divisors is an integer number (587122587).

Almost surely, 2^6461502464 is an apocalyptic number.

6461502464 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6461502464 is a deficient number, since it is larger than the sum of its proper divisors (6455194450).

6461502464 is an equidigital number, since it uses as much as digits as its factorization.

6461502464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6310081 (or 6310063 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The square root of 6461502464 is about 80383.4713358412. The cubic root of 6461502464 is about 1862.5638578409.

The spelling of 6461502464 in words is "six billion, four hundred sixty-one million, five hundred two thousand, four hundred sixty-four".