194253591387 has 32 divisors (see below), whose sum is σ = 269366860800. Its totient is φ = 124370285312.

The previous prime is 194253591377. The next prime is 194253591401. The reversal of 194253591387 is 783195352491.

It is a happy number.

It is not a de Polignac number, because 194253591387 - 2²³ = 194245202779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194253591307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19810828 + ... + 19820630.

It is an arithmetic number, because the mean of its divisors is an integer number (8417714400).

Almost surely, 2^194253591387 is an apocalyptic number.

194253591387 is a deficient number, since it is larger than the sum of its proper divisors (75113269413).

194253591387 is a wasteful number, since it uses less digits than its factorization.

194253591387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11027.

The product of its digits is 8164800, while the sum is 57.

The spelling of 194253591387 in words is "one hundred ninety-four billion, two hundred fifty-three million, five hundred ninety-one thousand, three hundred eighty-seven".