11451235540 has 12 divisors (see below), whose sum is σ = 24047594676. Its totient is φ = 4580494208.

The previous prime is 11451235517. The next prime is 11451235573. The reversal of 11451235540 is 4553215411.

It can be written as a sum of positive squares in 2 ways, for example, as 3466383376 + 7984852164 = 58876^2 + 89358^2 .

It is a super-2 number, since 2×11451235540² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286280869 + ... + 286280908.

It is an arithmetic number, because the mean of its divisors is an integer number (2003966223).

Almost surely, 2^11451235540 is an apocalyptic number.

11451235540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11451235540 is an abundant number, since it is smaller than the sum of its proper divisors (12596359136).

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

11451235540 is a wasteful number, since it uses less digits than its factorization.

11451235540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572561786 (or 572561784 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 11451235540 in words is "eleven billion, four hundred fifty-one million, two hundred thirty-five thousand, five hundred forty".