197861616 has 50 divisors (see below), whose sum is σ = 572672672. Its totient is φ = 65953440.

The previous prime is 197861603. The next prime is 197861627. The reversal of 197861616 is 616168791.

197861616 is a `hidden beast` number, since 19 + 7 + 8 + 616 + 16 = 666.

It is a super-2 number, since 2×197861616² = 78298438172262912, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 75040 + ... + 77631.

Almost surely, 2^197861616 is an apocalyptic number.

197861616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

197861616 is an abundant number, since it is smaller than the sum of its proper divisors (374811056).

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

197861616 is a wasteful number, since it uses less digits than its factorization.

197861616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152691 (or 152676 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 197861616 is about 14066.3291586682. The cubic root of 197861616 is about 582.7118508342.

The spelling of 197861616 in words is "one hundred ninety-seven million, eight hundred sixty-one thousand, six hundred sixteen".