190744661457 has 48 divisors (see below), whose sum is σ = 329186217600. Its totient is φ = 108842680800.

The previous prime is 190744661453. The next prime is 190744661483. The reversal of 190744661457 is 754166447091.

It is a happy number.

190744661457 is a `hidden beast` number, since 1 + 90 + 7 + 4 + 46 + 61 + 457 = 666.

It is not a de Polignac number, because 190744661457 - 2² = 190744661453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190744661453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 836332 + ... + 1039682.

It is an arithmetic number, because the mean of its divisors is an integer number (6858046200).

Almost surely, 2^190744661457 is an apocalyptic number.

It is an amenable number.

190744661457 is a deficient number, since it is larger than the sum of its proper divisors (138441556143).

190744661457 is a wasteful number, since it uses less digits than its factorization.

190744661457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204083 (or 204070 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 54.

The spelling of 190744661457 in words is "one hundred ninety billion, seven hundred forty-four million, six hundred sixty-one thousand, four hundred fifty-seven".