80546173440 has 160 divisors (see below), whose sum is σ = 257758877376. Its totient is φ = 21457059840.

The previous prime is 80546173439. The next prime is 80546173441. The reversal of 80546173440 is 4437164508.

It is an interprime number because it is at equal distance from previous prime (80546173439) and next prime (80546173441).

It is a tau number, because it is divible by the number of its divisors (160).

It is a super-2 number, since 2×80546173440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 80546173392 and 80546173401.

It is not an unprimeable number, because it can be changed into a prime (80546173441) 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, 8374074 + ... + 8383686.

Almost surely, 2^80546173440 is an apocalyptic number.

80546173440 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 80546173440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128879438688).

80546173440 is an abundant number, since it is smaller than the sum of its proper divisors (177212703936).

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

80546173440 is a wasteful number, since it uses less digits than its factorization.

80546173440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10730 (or 10714 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 80546173440 in words is "eighty billion, five hundred forty-six million, one hundred seventy-three thousand, four hundred forty".