80631009900 has 288 divisors, whose sum is σ = 296757672960. Its totient is φ = 18398016000.

The previous prime is 80631009853. The next prime is 80631009913. The reversal of 80631009900 is 990013608.

It is a super-4 number, since 4×80631009900⁴ (a number of 45 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11922520 + ... + 11929280.

Almost surely, 2^80631009900 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80631009900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148378836480).

80631009900 is an abundant number, since it is smaller than the sum of its proper divisors (216126663060).

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

80631009900 is a wasteful number, since it uses less digits than its factorization.

80631009900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7422 (or 7409 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

Adding to 80631009900 its sum of digits (36), we get a square (80631009936 = 283956²).

The spelling of 80631009900 in words is "eighty billion, six hundred thirty-one million, nine thousand, nine hundred".