11401515440 has 80 divisors (see below), whose sum is σ = 31889982720. Its totient is φ = 3703345920.

The previous prime is 11401515413. The next prime is 11401515457. The reversal of 11401515440 is 4451510411.

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

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, 525146 + ... + 546425.

It is an arithmetic number, because the mean of its divisors is an integer number (398624784).

Almost surely, 2^11401515440 is an apocalyptic number.

11401515440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11401515440 is an abundant number, since it is smaller than the sum of its proper divisors (20488467280).

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

11401515440 is a wasteful number, since it uses less digits than its factorization.

11401515440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1071610 (or 1071604 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The spelling of 11401515440 in words is "eleven billion, four hundred one million, five hundred fifteen thousand, four hundred forty".