3611521948961 has 8 divisors (see below), whose sum is σ = 3734551611648. Its totient is φ = 3488900346000.

The previous prime is 3611521948943. The next prime is 3611521948987. The reversal of 3611521948961 is 1698491251163.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3611521948961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3611521948897 and 3611521948906.

It is not an unprimeable number, because it can be changed into a prime (3611521948921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101996930 + ... + 102032331.

It is an arithmetic number, because the mean of its divisors is an integer number (466818951456).

Almost surely, 2^{3611521948961} is an apocalyptic number.

3611521948961 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3611521948961 is a deficient number, since it is larger than the sum of its proper divisors (123029662687).

3611521948961 is a wasteful number, since it uses less digits than its factorization.

3611521948961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204029863.

The product of its digits is 2799360, while the sum is 56.

The spelling of 3611521948961 in words is "three trillion, six hundred eleven billion, five hundred twenty-one million, nine hundred forty-eight thousand, nine hundred sixty-one".