4061663510521 has 4 divisors (see below), whose sum is σ = 4065280309072. Its totient is φ = 4058046711972.

The previous prime is 4061663510449. The next prime is 4061663510539. The reversal of 4061663510521 is 1250153661604.

It is a happy number.

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 4061663510521 - 2²³ = 4061655121913 is a prime.

It is a super-2 number, since 2×4061663510521² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4061663550521) 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, 1808397591 + ... + 1808399836.

It is an arithmetic number, because the mean of its divisors is an integer number (1016320077268).

Almost surely, 2^{4061663510521} is an apocalyptic number.

It is an amenable number.

4061663510521 is a deficient number, since it is larger than the sum of its proper divisors (3616798551).

4061663510521 is a wasteful number, since it uses less digits than its factorization.

4061663510521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616798550.

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 4061663510521 in words is "four trillion, sixty-one billion, six hundred sixty-three million, five hundred ten thousand, five hundred twenty-one".