197806490406 has 48 divisors (see below), whose sum is σ = 490202897184. Its totient is φ = 56470407552.

The previous prime is 197806490363. The next prime is 197806490471. The reversal of 197806490406 is 604094608791.

197806490406 is a `hidden beast` number, since 1 + 97 + 8 + 0 + 64 + 90 + 406 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 478695 + ... + 790418.

It is an arithmetic number, because the mean of its divisors is an integer number (10212560358).

Almost surely, 2^197806490406 is an apocalyptic number.

197806490406 is an abundant number, since it is smaller than the sum of its proper divisors (292396406778).

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

197806490406 is a wasteful number, since it uses less digits than its factorization.

197806490406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270365 (or 1270362 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 197806490406 in words is "one hundred ninety-seven billion, eight hundred six million, four hundred ninety thousand, four hundred six".