18157196453 has 8 divisors (see below), whose sum is σ = 19842547296. Its totient is φ = 16477628400.

The previous prime is 18157196437. The next prime is 18157196479. The reversal of 18157196453 is 35469175181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18157196453 - 2⁴ = 18157196437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18157196413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1439126 + ... + 1451687.

It is an arithmetic number, because the mean of its divisors is an integer number (2480318412).

Almost surely, 2^18157196453 is an apocalyptic number.

It is an amenable number.

18157196453 is a deficient number, since it is larger than the sum of its proper divisors (1685350843).

18157196453 is a wasteful number, since it uses less digits than its factorization.

18157196453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2891395.

The product of its digits is 907200, while the sum is 50.

The spelling of 18157196453 in words is "eighteen billion, one hundred fifty-seven million, one hundred ninety-six thousand, four hundred fifty-three".