28163409691950 has 480 divisors, whose sum is σ = 89263428274944. Its totient is φ = 6522230108160.

The previous prime is 28163409691883. The next prime is 28163409691961. The reversal of 28163409691950 is 5919690436182.

28163409691950 is a `hidden beast` number, since 2 + 8 + 16 + 340 + 96 + 9 + 195 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 3398500707 + ... + 3398508993.

Almost surely, 2^{28163409691950} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28163409691950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44631714137472).

28163409691950 is an abundant number, since it is smaller than the sum of its proper divisors (61100018582994).

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

28163409691950 is a wasteful number, since it uses less digits than its factorization.

28163409691950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12138 (or 12124 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 28163409691950 in words is "twenty-eight trillion, one hundred sixty-three billion, four hundred nine million, six hundred ninety-one thousand, nine hundred fifty".