190440943551 has 24 divisors (see below), whose sum is σ = 275842110960. Its totient is φ = 126609858816.

The previous prime is 190440943547. The next prime is 190440943571. The reversal of 190440943551 is 155349044091.

190440943551 is a `hidden beast` number, since 1 + 9 + 0 + 4 + 4 + 0 + 94 + 3 + 551 = 666.

It is not a de Polignac number, because 190440943551 - 2² = 190440943547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 190440943497 and 190440943506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190440943571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7169671 + ... + 7196183.

It is an arithmetic number, because the mean of its divisors is an integer number (11493421290).

Almost surely, 2^190440943551 is an apocalyptic number.

190440943551 is a deficient number, since it is larger than the sum of its proper divisors (85401167409).

190440943551 is a wasteful number, since it uses less digits than its factorization.

190440943551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28695 (or 28692 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 190440943551 in words is "one hundred ninety billion, four hundred forty million, nine hundred forty-three thousand, five hundred fifty-one".