11405501380 has 48 divisors (see below), whose sum is σ = 29478839040. Its totient is φ = 3609652608.

The previous prime is 11405501377. The next prime is 11405501383. The reversal of 11405501380 is 8310550411.

It is an interprime number because it is at equal distance from previous prime (11405501377) and next prime (11405501383).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (11405501383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3131560 + ... + 3135199.

It is an arithmetic number, because the mean of its divisors is an integer number (614142480).

Almost surely, 2^11405501380 is an apocalyptic number.

11405501380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11405501380 is an abundant number, since it is smaller than the sum of its proper divisors (18073337660).

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

11405501380 is a wasteful number, since it uses less digits than its factorization.

11405501380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6266788 (or 6266786 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 28.

The spelling of 11405501380 in words is "eleven billion, four hundred five million, five hundred one thousand, three hundred eighty".