1661051032520 has 32 divisors (see below), whose sum is σ = 4077125262720. Its totient is φ = 604018557120.

The previous prime is 1661051032517. The next prime is 1661051032549. The reversal of 1661051032520 is 252301501661.

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, 1887557552 + ... + 1887558431.

It is an arithmetic number, because the mean of its divisors is an integer number (127410164460).

Almost surely, 2^{1661051032520} is an apocalyptic number.

1661051032520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1661051032520 is an abundant number, since it is smaller than the sum of its proper divisors (2416074230200).

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

1661051032520 is a wasteful number, since it uses less digits than its factorization.

1661051032520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3775116005 (or 3775116001 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The spelling of 1661051032520 in words is "one trillion, six hundred sixty-one billion, fifty-one million, thirty-two thousand, five hundred twenty".