190137778768 has 30 divisors (see below), whose sum is σ = 428537572026. Its totient is φ = 81487619136.

The previous prime is 190137778729. The next prime is 190137778769. The reversal of 190137778768 is 867877731091.

It can be written as a sum of positive squares in only one way, i.e., 189475642944 + 662135824 = 435288^2 + 25732^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190137778769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121260555 + ... + 121262122.

Almost surely, 2^190137778768 is an apocalyptic number.

It is an amenable number.

190137778768 is an abundant number, since it is smaller than the sum of its proper divisors (238399793258).

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

190137778768 is a wasteful number, since it uses less digits than its factorization.

190137778768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242522699 (or 242522686 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 64.

The spelling of 190137778768 in words is "one hundred ninety billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, seven hundred sixty-eight".