51040198386 has 40 divisors (see below), whose sum is σ = 114552839280. Its totient is φ = 16985880792.

The previous prime is 51040198369. The next prime is 51040198393. The reversal of 51040198386 is 68389104015.

51040198386 is a `hidden beast` number, since 510 + 40 + 1 + 98 + 3 + 8 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 154216 + ... + 354771.

It is an arithmetic number, because the mean of its divisors is an integer number (2863820982).

Almost surely, 2^51040198386 is an apocalyptic number.

51040198386 is an abundant number, since it is smaller than the sum of its proper divisors (63512640894).

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

51040198386 is a wasteful number, since it uses less digits than its factorization.

51040198386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509620 (or 509611 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 51040198386 in words is "fifty-one billion, forty million, one hundred ninety-eight thousand, three hundred eighty-six".