81880678598 has 8 divisors (see below), whose sum is σ = 122886598008. Its totient is φ = 40918479264.

The previous prime is 81880678597. The next prime is 81880678637. The reversal of 81880678598 is 89587608818.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81880678597) 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, 10925336 + ... + 10932827.

It is an arithmetic number, because the mean of its divisors is an integer number (15360824751).

Almost surely, 2^81880678598 is an apocalyptic number.

81880678598 is a deficient number, since it is larger than the sum of its proper divisors (41005919410).

81880678598 is a wasteful number, since it uses less digits than its factorization.

81880678598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21860038.

The product of its (nonzero) digits is 61931520, while the sum is 68.

The spelling of 81880678598 in words is "eighty-one billion, eight hundred eighty million, six hundred seventy-eight thousand, five hundred ninety-eight".