194206985767872 has 896 divisors, whose sum is σ = 731590974996480. Its totient is φ = 49055402373120.

The previous prime is 194206985767819. The next prime is 194206985767877. The reversal of 194206985767872 is 278767589602491.

194206985767872 is a `hidden beast` number, since 1 + 9 + 420 + 6 + 9 + 8 + 57 + 6 + 78 + 72 = 666.

It is a super-2 number, since 2×194206985767872² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 194206985767791 and 194206985767800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194206985767877) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 981721323 + ... + 981919125.

Almost surely, 2^{194206985767872} is an apocalyptic number.

194206985767872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194206985767872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365795487498240).

194206985767872 is an abundant number, since it is smaller than the sum of its proper divisors (537383989228608).

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

194206985767872 is a wasteful number, since it uses less digits than its factorization.

194206985767872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198046 (or 198030 counting only the distinct ones).

The product of its (nonzero) digits is 5120962560, while the sum is 81.

The spelling of 194206985767872 in words is "one hundred ninety-four trillion, two hundred six billion, nine hundred eighty-five million, seven hundred sixty-seven thousand, eight hundred seventy-two".