11420801280 has 576 divisors, whose sum is σ = 49059924480. Its totient is φ = 2456027136.

The previous prime is 11420801269. The next prime is 11420801339. The reversal of 11420801280 is 8210802411.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-3 number, since 3×11420801280³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4111252 + ... + 4114028.

It is an arithmetic number, because the mean of its divisors is an integer number (85173480).

Almost surely, 2^11420801280 is an apocalyptic number.

11420801280 is a gapful number since it is divisible by the number (10) 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 11420801280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24529962240).

11420801280 is an abundant number, since it is smaller than the sum of its proper divisors (37639123200).

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

11420801280 is a wasteful number, since it uses less digits than its factorization.

11420801280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2831 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The spelling of 11420801280 in words is "eleven billion, four hundred twenty million, eight hundred one thousand, two hundred eighty".