190686721254 has 16 divisors (see below), whose sum is σ = 389487771648. Its totient is φ = 62209852232.

The previous prime is 190686721217. The next prime is 190686721261. The reversal of 190686721254 is 452127686091.

190686721254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×190686721254² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190686721197 and 190686721206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338096742 + ... + 338097305.

It is an arithmetic number, because the mean of its divisors is an integer number (24342985728).

Almost surely, 2^190686721254 is an apocalyptic number.

190686721254 is an abundant number, since it is smaller than the sum of its proper divisors (198801050394).

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

190686721254 is a wasteful number, since it uses less digits than its factorization.

190686721254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676194099.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 190686721254 in words is "one hundred ninety billion, six hundred eighty-six million, seven hundred twenty-one thousand, two hundred fifty-four".