3661210121664 has 112 divisors (see below), whose sum is σ = 10181907203328. Its totient is φ = 1158821419008.

The previous prime is 3661210121627. The next prime is 3661210121683. The reversal of 3661210121664 is 4661210121663.

It is a congruent 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, 2420842 + ... + 3630825.

It is an arithmetic number, because the mean of its divisors is an integer number (90909885744).

Almost surely, 2^{3661210121664} is an apocalyptic number.

It is an amenable number.

3661210121664 is an abundant number, since it is smaller than the sum of its proper divisors (6520697081664).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3661210121664 is a wasteful number, since it uses less digits than its factorization.

3661210121664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6051842 (or 6051832 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 39.

Subtracting 3661210121664 from its reverse (4661210121663), we obtain a palindrome (999999999999).

The spelling of 3661210121664 in words is "three trillion, six hundred sixty-one billion, two hundred ten million, one hundred twenty-one thousand, six hundred sixty-four".