161975280700 has 36 divisors (see below), whose sum is σ = 351791983872. Its totient is φ = 64733776000.

The previous prime is 161975280689. The next prime is 161975280737. The reversal of 161975280700 is 7082579161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 588529 + ... + 818728.

It is an arithmetic number, because the mean of its divisors is an integer number (9771999552).

Almost surely, 2^161975280700 is an apocalyptic number.

161975280700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161975280700 is an abundant number, since it is smaller than the sum of its proper divisors (189816703172).

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

161975280700 is a wasteful number, since it uses less digits than its factorization.

161975280700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1408422 (or 1408415 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 161975280700 in words is "one hundred sixty-one billion, nine hundred seventy-five million, two hundred eighty thousand, seven hundred".