201668351852 has 24 divisors (see below), whose sum is σ = 395408712720. Its totient is φ = 89189933760.

The previous prime is 201668351837. The next prime is 201668351887. The reversal of 201668351852 is 258153866102.

It is a junction number, because it is equal to n+sod(n) for n = 201668351797 and 201668351806.

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, 61935827 + ... + 61939082.

It is an arithmetic number, because the mean of its divisors is an integer number (16475363030).

Almost surely, 2^201668351852 is an apocalyptic number.

201668351852 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201668351852 is a deficient number, since it is larger than the sum of its proper divisors (193740360868).

201668351852 is a wasteful number, since it uses less digits than its factorization.

201668351852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123874961 (or 123874959 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 47.

The spelling of 201668351852 in words is "two hundred one billion, six hundred sixty-eight million, three hundred fifty-one thousand, eight hundred fifty-two".