6461642450 has 24 divisors (see below), whose sum is σ = 12183300948. Its totient is φ = 2549249280.

The previous prime is 6461642441. The next prime is 6461642459. The reversal of 6461642450 is 542461646.

It is an interprime number because it is at equal distance from previous prime (6461642441) and next prime (6461642459).

It can be written as a sum of positive squares in 6 ways, for example, as 1932217849 + 4529424601 = 43957^2 + 67301^2 .

It is not an unprimeable number, because it can be changed into a prime (6461642459) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 881507 + ... + 888806.

Almost surely, 2^6461642450 is an apocalyptic number.

6461642450 is a deficient number, since it is larger than the sum of its proper divisors (5721658498).

6461642450 is a wasteful number, since it uses less digits than its factorization.

6461642450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1770398 (or 1770393 counting only the distinct ones).

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

The square root of 6461642450 is about 80384.3420698335. The cubic root of 6461642450 is about 1862.5773083236.

The spelling of 6461642450 in words is "six billion, four hundred sixty-one million, six hundred forty-two thousand, four hundred fifty".