197661696 has 132 divisors (see below), whose sum is σ = 552984768. Its totient is φ = 62742528.

The previous prime is 197661689. The next prime is 197661719. The reversal of 197661696 is 696166791.

Its product of digits (734832) is a multiple of the sum of its prime factors (144).

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, 4205545 + ... + 4205591.

Almost surely, 2^197661696 is an apocalyptic number.

197661696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197661696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276492384).

197661696 is an abundant number, since it is smaller than the sum of its proper divisors (355323072).

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

197661696 is an equidigital number, since it uses as much as digits as its factorization.

197661696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 89 counting only the distinct ones).

The product of its digits is 734832, while the sum is 51.

The square root of 197661696 is about 14059.2210310529. The cubic root of 197661696 is about 582.5155267340.

The spelling of 197661696 in words is "one hundred ninety-seven million, six hundred sixty-one thousand, six hundred ninety-six".