80647539840 has 1152 divisors, whose sum is σ = 354267950400. Its totient is φ = 17432174592.

The previous prime is 80647539839. The next prime is 80647539913. The reversal of 80647539840 is 4893574608.

80647539840 is a `hidden beast` number, since 8 + 0 + 64 + 7 + 539 + 8 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 144788842 + ... + 144789398.

Almost surely, 2^80647539840 is an apocalyptic number.

80647539840 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 80647539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177133975200).

80647539840 is an abundant number, since it is smaller than the sum of its proper divisors (273620410560).

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

80647539840 is a wasteful number, since it uses less digits than its factorization.

80647539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 593 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 80647539840 in words is "eighty billion, six hundred forty-seven million, five hundred thirty-nine thousand, eight hundred forty".