190137778812 has 48 divisors (see below), whose sum is σ = 495703756800. Its totient is φ = 63025179120.

The previous prime is 190137778769. The next prime is 190137778837. The reversal of 190137778812 is 218877731091.

190137778812 is a `hidden beast` number, since 190 + 1 + 377 + 7 + 8 + 81 + 2 = 666.

It is a super-2 number, since 2×190137778812² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4898364 + ... + 4937027.

It is an arithmetic number, because the mean of its divisors is an integer number (10327161600).

Almost surely, 2^190137778812 is an apocalyptic number.

190137778812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

190137778812 is an abundant number, since it is smaller than the sum of its proper divisors (305565977988).

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

190137778812 is a wasteful number, since it uses less digits than its factorization.

190137778812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9835583 (or 9835575 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 54.

The spelling of 190137778812 in words is "one hundred ninety billion, one hundred thirty-seven million, seven hundred seventy-eight thousand, eight hundred twelve".