6461140465 has 16 divisors (see below), whose sum is σ = 8351679168. Its totient is φ = 4770219456.

The previous prime is 6461140459. The next prime is 6461140487. The reversal of 6461140465 is 5640411646.

It is a cyclic number.

It is not a de Polignac number, because 6461140465 - 2¹¹ = 6461138417 is a prime.

It is a super-2 number, since 2×6461140465² = 83492672216920832450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 380854 + ... + 397456.

It is an arithmetic number, because the mean of its divisors is an integer number (521979948).

Almost surely, 2^6461140465 is an apocalyptic number.

6461140465 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6461140465 is a deficient number, since it is larger than the sum of its proper divisors (1890538703).

6461140465 is a wasteful number, since it uses less digits than its factorization.

6461140465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22608.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 6461140465 is about 80381.2196038353. The cubic root of 6461140465 is about 1862.5290744527.

The spelling of 6461140465 in words is "six billion, four hundred sixty-one million, one hundred forty thousand, four hundred sixty-five".