11861562418440 has 64 divisors (see below), whose sum is σ = 40668214008960. Its totient is φ = 2711214266880.

The previous prime is 11861562418369. The next prime is 11861562418477. The reversal of 11861562418440 is 4481426516811.

It is a super-3 number, since 3×11861562418440³ (a number of 40 digits) contains 333 as substring.

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, 7060452981 + ... + 7060454660.

It is an arithmetic number, because the mean of its divisors is an integer number (635440843890).

Almost surely, 2^{11861562418440} is an apocalyptic number.

11861562418440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11861562418440 is an abundant number, since it is smaller than the sum of its proper divisors (28806651590520).

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

11861562418440 is a wasteful number, since it uses less digits than its factorization.

11861562418440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14120907662 (or 14120907658 counting only the distinct ones).

The product of its (nonzero) digits is 1474560, while the sum is 51.

The spelling of 11861562418440 in words is "eleven trillion, eight hundred sixty-one billion, five hundred sixty-two million, four hundred eighteen thousand, four hundred forty".