6461470649 has 4 divisors (see below), whose sum is σ = 6476892240. Its totient is φ = 6446049060.

The previous prime is 6461470633. The next prime is 6461470651. The reversal of 6461470649 is 9460741646.

6461470649 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9460741646 = 2 ⋅4730370823.

It is a cyclic number.

It is not a de Polignac number, because 6461470649 - 2⁴ = 6461470633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6461470679) 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, 7710167 + ... + 7711004.

It is an arithmetic number, because the mean of its divisors is an integer number (1619223060).

Almost surely, 2^6461470649 is an apocalyptic number.

It is an amenable number.

6461470649 is a deficient number, since it is larger than the sum of its proper divisors (15421591).

6461470649 is a wasteful number, since it uses less digits than its factorization.

6461470649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15421590.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 6461470649 is about 80383.2734404366. The cubic root of 6461470649 is about 1862.5608008859.

The spelling of 6461470649 in words is "six billion, four hundred sixty-one million, four hundred seventy thousand, six hundred forty-nine".