194923371545 has 32 divisors (see below), whose sum is σ = 275994525696. Its totient is φ = 129327710400.

The previous prime is 194923371497. The next prime is 194923371569. The reversal of 194923371545 is 545173329491.

It is not a de Polignac number, because 194923371545 - 2²² = 194919177241 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8328710 + ... + 8352080.

It is an arithmetic number, because the mean of its divisors is an integer number (8624828928).

Almost surely, 2^194923371545 is an apocalyptic number.

It is an amenable number.

194923371545 is a deficient number, since it is larger than the sum of its proper divisors (81071154151).

194923371545 is a wasteful number, since it uses less digits than its factorization.

194923371545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31101.

The product of its digits is 4082400, while the sum is 53.

The spelling of 194923371545 in words is "one hundred ninety-four billion, nine hundred twenty-three million, three hundred seventy-one thousand, five hundred forty-five".