161802805177632 has 48 divisors (see below), whose sum is σ = 431695189239552. Its totient is φ = 53050100056320.

The previous prime is 161802805177613. The next prime is 161802805177649. The reversal of 161802805177632 is 236771508208161.

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

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, 13815124368 + ... + 13815136079.

It is an arithmetic number, because the mean of its divisors is an integer number (8993649775824).

Almost surely, 2^{161802805177632} is an apocalyptic number.

161802805177632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161802805177632 is an abundant number, since it is smaller than the sum of its proper divisors (269892384061920).

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

161802805177632 is a wasteful number, since it uses less digits than its factorization.

161802805177632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27630260521 (or 27630260513 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 161802805177632 in words is "one hundred sixty-one trillion, eight hundred two billion, eight hundred five million, one hundred seventy-seven thousand, six hundred thirty-two".