1641662876640 has 48 divisors (see below), whose sum is σ = 5171238062928. Its totient is φ = 437776766976.

The previous prime is 1641662876629. The next prime is 1641662876657. The reversal of 1641662876640 is 466782661461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710065017 + ... + 1710065976.

It is an arithmetic number, because the mean of its divisors is an integer number (107734126311).

Almost surely, 2^{1641662876640} is an apocalyptic number.

1641662876640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641662876640 is an abundant number, since it is smaller than the sum of its proper divisors (3529575186288).

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

1641662876640 is a wasteful number, since it uses less digits than its factorization.

1641662876640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420131011 (or 3420131003 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 1641662876640 in words is "one trillion, six hundred forty-one billion, six hundred sixty-two million, eight hundred seventy-six thousand, six hundred forty".