161191276700 has 36 divisors (see below), whose sum is σ = 351442865592. Its totient is φ = 64170926400.

The previous prime is 161191276643. The next prime is 161191276711. The reversal of 161191276700 is 7672191161.

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, 3798599 + ... + 3840798.

It is an arithmetic number, because the mean of its divisors is an integer number (9762301822).

Almost surely, 2^161191276700 is an apocalyptic number.

161191276700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161191276700 is an abundant number, since it is smaller than the sum of its proper divisors (190251588892).

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

161191276700 is a wasteful number, since it uses less digits than its factorization.

161191276700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7639622 (or 7639615 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 41.

The spelling of 161191276700 in words is "one hundred sixty-one billion, one hundred ninety-one million, two hundred seventy-six thousand, seven hundred".