197955351950 has 24 divisors (see below), whose sum is σ = 373240755408. Its totient is φ = 78097452480.

The previous prime is 197955351949. The next prime is 197955351961. The reversal of 197955351950 is 59153559791.

It is a self number, because there is not a number n which added to its sum of digits gives 197955351950.

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, 27113522 + ... + 27120821.

It is an arithmetic number, because the mean of its divisors is an integer number (15551698142).

Almost surely, 2^197955351950 is an apocalyptic number.

197955351950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197955351950 is a deficient number, since it is larger than the sum of its proper divisors (175285403458).

197955351950 is a wasteful number, since it uses less digits than its factorization.

197955351950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54234428 (or 54234423 counting only the distinct ones).

The product of its (nonzero) digits is 9568125, while the sum is 59.

The spelling of 197955351950 in words is "one hundred ninety-seven billion, nine hundred fifty-five million, three hundred fifty-one thousand, nine hundred fifty".