163541606654413 has 4 divisors (see below), whose sum is σ = 176121730243228. Its totient is φ = 150961483065600.

The previous prime is 163541606654383. The next prime is 163541606654423. The reversal of 163541606654413 is 314456606145361.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 99830511876484 + 63711094777929 = 9991522^2 + 7981923^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163541606654413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163541606654423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6290061794388 + ... + 6290061794413.

It is an arithmetic number, because the mean of its divisors is an integer number (44030432560807).

Almost surely, 2^{163541606654413} is an apocalyptic number.

163541606654413 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

163541606654413 is a deficient number, since it is larger than the sum of its proper divisors (12580123588815).

163541606654413 is a wasteful number, since it uses less digits than its factorization.

163541606654413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12580123588814.

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 163541606654413 in words is "one hundred sixty-three trillion, five hundred forty-one billion, six hundred six million, six hundred fifty-four thousand, four hundred thirteen".