465695691561 has 9 divisors (see below), whose sum is σ = 672674511639. Its totient is φ = 310462429536.

The previous prime is 465695691511. The next prime is 465695691563. The reversal of 465695691561 is 165196596564.

The square root of 465695691561 is 682419.

It is a perfect power (a square), and thus also a powerful number.

465695691561 is a `hidden beast` number, since 4 + 6 + 5 + 6 + 9 + 5 + 69 + 1 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100086813225 + 365608878336 = 316365^2 + 604656^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is a de Polignac number, because none of the positive numbers 2^k-465695691561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (465695691563) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1933521 + ... + 2160993.

Almost surely, 2^465695691561 is an apocalyptic number.

465695691561 is the 682419-th square number.

465695691561 is the 341210-th centered octagonal number.

It is an amenable number.

465695691561 is a deficient number, since it is larger than the sum of its proper divisors (206978820078).

465695691561 is an frugal number, since it uses more digits than its factorization.

465695691561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454952 (or 227476 counting only the distinct ones).

The product of its digits is 52488000, while the sum is 63.

The spelling of 465695691561 in words is "four hundred sixty-five billion, six hundred ninety-five million, six hundred ninety-one thousand, five hundred sixty-one".