80121600 has 324 divisors, whose sum is σ = 311370696. Its totient is φ = 19537920.

The previous prime is 80121593. The next prime is 80121611. The reversal of 80121600 is 612108.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 748747 + ... + 748853.

Almost surely, 2^80121600 is an apocalyptic number.

80121600 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 80121600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155685348).

80121600 is an abundant number, since it is smaller than the sum of its proper divisors (231249096).

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

80121600 is a wasteful number, since it uses less digits than its factorization.

80121600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 80121600 is about 8951.0669755063. The cubic root of 80121600 is about 431.1051435348.

Adding to 80121600 its reverse (612108), we get a palindrome (80733708).

The spelling of 80121600 in words is "eighty million, one hundred twenty-one thousand, six hundred".