194887378718 has 32 divisors (see below), whose sum is σ = 314452248768. Its totient is φ = 90257036800.

The previous prime is 194887378717. The next prime is 194887378729. The reversal of 194887378718 is 817873788491.

It is a Harshad number since it is a multiple of its sum of digits (71).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194887378711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272128 + ... + 1417068.

It is an arithmetic number, because the mean of its divisors is an integer number (9826632774).

Almost surely, 2^194887378718 is an apocalyptic number.

194887378718 is a deficient number, since it is larger than the sum of its proper divisors (119564870050).

194887378718 is a wasteful number, since it uses less digits than its factorization.

194887378718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145588.

The product of its digits is 151732224, while the sum is 71.

The spelling of 194887378718 in words is "one hundred ninety-four billion, eight hundred eighty-seven million, three hundred seventy-eight thousand, seven hundred eighteen".