84161561601 has 16 divisors (see below), whose sum is σ = 120866135040. Its totient is φ = 51783688320.

The previous prime is 84161561569. The next prime is 84161561609. The reversal of 84161561601 is 10616516148.

It is not a de Polignac number, because 84161561601 - 2⁵ = 84161561569 is a prime.

It is a super-2 number, since 2×84161561601² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 84161561601.

It is not an unprimeable number, because it can be changed into a prime (84161561609) 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, 91936 + ... + 420446.

It is an arithmetic number, because the mean of its divisors is an integer number (7554133440).

Almost surely, 2^84161561601 is an apocalyptic number.

It is an amenable number.

84161561601 is a deficient number, since it is larger than the sum of its proper divisors (36704573439).

84161561601 is a wasteful number, since it uses less digits than its factorization.

84161561601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335096.

The product of its (nonzero) digits is 34560, while the sum is 39.

The spelling of 84161561601 in words is "eighty-four billion, one hundred sixty-one million, five hundred sixty-one thousand, six hundred one".