10217075778 has 160 divisors (see below), whose sum is σ = 29403069696. Its totient is φ = 2577370752.

The previous prime is 10217075773. The next prime is 10217075783. The reversal of 10217075778 is 87757071201.

It is a happy number.

10217075778 is a `hidden beast` number, since 1 + 0 + 2 + 1 + 70 + 7 + 577 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (10217075773) and next prime (10217075783).

It is not an unprimeable number, because it can be changed into a prime (10217075773) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 324000 + ... + 354132.

Almost surely, 2^10217075778 is an apocalyptic number.

10217075778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10217075778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14701534848).

10217075778 is an abundant number, since it is smaller than the sum of its proper divisors (19185993918).

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

10217075778 is a wasteful number, since it uses less digits than its factorization.

10217075778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30190 (or 30181 counting only the distinct ones).

The product of its (nonzero) digits is 192080, while the sum is 45.

The spelling of 10217075778 in words is "ten billion, two hundred seventeen million, seventy-five thousand, seven hundred seventy-eight".