11443951640540 has 24 divisors (see below), whose sum is σ = 24807533880192. Its totient is φ = 4429916763840.

The previous prime is 11443951640477. The next prime is 11443951640543. The reversal of 11443951640540 is 4504615934411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11443951640543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9228992639 + ... + 9228993878.

It is an arithmetic number, because the mean of its divisors is an integer number (1033647245008).

Almost surely, 2^{11443951640540} is an apocalyptic number.

11443951640540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11443951640540 is an abundant number, since it is smaller than the sum of its proper divisors (13363582239652).

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

11443951640540 is a wasteful number, since it uses less digits than its factorization.

11443951640540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18457986557 (or 18457986555 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 47.

The spelling of 11443951640540 in words is "eleven trillion, four hundred forty-three billion, nine hundred fifty-one million, six hundred forty thousand, five hundred forty".