81601008060 has 96 divisors (see below), whose sum is σ = 268427400192. Its totient is φ = 18260363520.

The previous prime is 81601008017. The next prime is 81601008103. The reversal of 81601008060 is 6080010618.

It is an interprime number because it is at equal distance from previous prime (81601008017) and next prime (81601008103).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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, 4746724 + ... + 4763883.

It is an arithmetic number, because the mean of its divisors is an integer number (2796118752).

Almost surely, 2^81601008060 is an apocalyptic number.

It is an amenable number.

81601008060 is an abundant number, since it is smaller than the sum of its proper divisors (186826392132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81601008060 is a wasteful number, since it uses less digits than its factorization.

81601008060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9510643 (or 9510641 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

Adding to 81601008060 its reverse (6080010618), we get a palindrome (87681018678).

The spelling of 81601008060 in words is "eighty-one billion, six hundred one million, eight thousand, sixty".