11626640540 has 12 divisors (see below), whose sum is σ = 24415945176. Its totient is φ = 4650656208.

The previous prime is 11626640539. The next prime is 11626640593. The reversal of 11626640540 is 4504662611.

It is a self number, because there is not a number n which added to its sum of digits gives 11626640540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290665994 + ... + 290666033.

It is an arithmetic number, because the mean of its divisors is an integer number (2034662098).

Almost surely, 2^11626640540 is an apocalyptic number.

11626640540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11626640540 is an abundant number, since it is smaller than the sum of its proper divisors (12789304636).

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

11626640540 is a wasteful number, since it uses less digits than its factorization.

11626640540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581332036 (or 581332034 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 11626640540 in words is "eleven billion, six hundred twenty-six million, six hundred forty thousand, five hundred forty".