1661147902000 has 40 divisors (see below), whose sum is σ = 4016655631872. Its totient is φ = 664459160000.

The previous prime is 1661147901937. The next prime is 1661147902019. The reversal of 1661147902000 is 2097411661.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 415284976 + ... + 415288975.

Almost surely, 2^{1661147902000} is an apocalyptic number.

1661147902000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661147902000 is an abundant number, since it is smaller than the sum of its proper divisors (2355507729872).

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

1661147902000 is an equidigital number, since it uses as much as digits as its factorization.

1661147902000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830573974 (or 830573958 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 1661147902000 in words is "one trillion, six hundred sixty-one billion, one hundred forty-seven million, nine hundred two thousand".