3646440543120 has 80 divisors (see below), whose sum is σ = 11310764255232. Its totient is φ = 971799321600.

The previous prime is 3646440543113. The next prime is 3646440543259. The reversal of 3646440543120 is 213450446463.

It is a tau number, because it is divible by the number of its divisors (80).

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, 4168981 + ... + 4967220.

Almost surely, 2^{3646440543120} is an apocalyptic number.

3646440543120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3646440543120 is an abundant number, since it is smaller than the sum of its proper divisors (7664323712112).

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

3646440543120 is a wasteful number, since it uses less digits than its factorization.

3646440543120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9137880 (or 9137874 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 42.

Adding to 3646440543120 its reverse (213450446463), we get a palindrome (3859890989583).

The spelling of 3646440543120 in words is "three trillion, six hundred forty-six billion, four hundred forty million, five hundred forty-three thousand, one hundred twenty".