4465631561 has 4 divisors (see below), whose sum is σ = 4609684224. Its totient is φ = 4321578900.

The previous prime is 4465631509. The next prime is 4465631581. The reversal of 4465631561 is 1651365644.

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.

It is a cyclic number.

It is not a de Polignac number, because 4465631561 - 2²⁶ = 4398522697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4465631581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72026285 + ... + 72026346.

It is an arithmetic number, because the mean of its divisors is an integer number (1152421056).

Almost surely, 2^4465631561 is an apocalyptic number.

It is an amenable number.

4465631561 is a deficient number, since it is larger than the sum of its proper divisors (144052663).

4465631561 is a wasteful number, since it uses less digits than its factorization.

4465631561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144052662.

The product of its digits is 259200, while the sum is 41.

The square root of 4465631561 is about 66825.3811137654. The cubic root of 4465631561 is about 1646.7498384770.

The spelling of 4465631561 in words is "four billion, four hundred sixty-five million, six hundred thirty-one thousand, five hundred sixty-one".