80689912611840 has 1760 divisors, whose sum is σ = 347377617252864. Its totient is φ = 17510765690880.

The previous prime is 80689912611839. The next prime is 80689912611859. The reversal of 80689912611840 is 4811621998608.

80689912611840 is a `hidden beast` number, since 8 + 0 + 6 + 8 + 9 + 9 + 1 + 2 + 611 + 8 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 9147474630 + ... + 9147483450.

Almost surely, 2^{80689912611840} is an apocalyptic number.

80689912611840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80689912611840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173688808626432).

80689912611840 is an abundant number, since it is smaller than the sum of its proper divisors (266687704641024).

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

80689912611840 is a wasteful number, since it uses less digits than its factorization.

80689912611840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9025 (or 8998 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 80689912611840 in words is "eighty trillion, six hundred eighty-nine billion, nine hundred twelve million, six hundred eleven thousand, eight hundred forty".