163541557473 has 16 divisors (see below), whose sum is σ = 251168440320. Its totient is φ = 92716472016.

The previous prime is 163541557469. The next prime is 163541557481. The reversal of 163541557473 is 374755145361.

It is not a de Polignac number, because 163541557473 - 2² = 163541557469 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163541557423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30657543 + ... + 30662876.

It is an arithmetic number, because the mean of its divisors is an integer number (15698027520).

Almost surely, 2^163541557473 is an apocalyptic number.

It is an amenable number.

163541557473 is a deficient number, since it is larger than the sum of its proper divisors (87626882847).

163541557473 is a wasteful number, since it uses less digits than its factorization.

163541557473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61320556.

The product of its digits is 5292000, while the sum is 51.

The spelling of 163541557473 in words is "one hundred sixty-three billion, five hundred forty-one million, five hundred fifty-seven thousand, four hundred seventy-three".