1001812080 has 80 divisors (see below), whose sum is σ = 3110050944. Its totient is φ = 266768640.

The previous prime is 1001812061. The next prime is 1001812099. The reversal of 1001812080 is 802181001.

It is an interprime number because it is at equal distance from previous prime (1001812061) and next prime (1001812099).

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192067 + ... + 197213.

Almost surely, 2^1001812080 is an apocalyptic number.

1001812080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001812080 is an abundant number, since it is smaller than the sum of its proper divisors (2108238864).

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

1001812080 is a wasteful number, since it uses less digits than its factorization.

1001812080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5974 (or 5968 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 1001812080 is about 31651.4151342400. The cubic root of 1001812080 is about 1000.6036621853.

Adding to 1001812080 its reverse (802181001), we get a palindrome (1803993081).

The spelling of 1001812080 in words is "one billion, one million, eight hundred twelve thousand, eighty".