11351111640 has 192 divisors, whose sum is σ = 37946815200. Its totient is φ = 2713835520.

The previous prime is 11351111627. The next prime is 11351111669. The reversal of 11351111640 is 4611115311.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 11351111640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1054606 + ... + 1065314.

Almost surely, 2^11351111640 is an apocalyptic number.

11351111640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11351111640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18973407600).

11351111640 is an abundant number, since it is smaller than the sum of its proper divisors (26595703560).

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

11351111640 is a wasteful number, since it uses less digits than its factorization.

11351111640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10818 (or 10803 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 24.

Adding to 11351111640 its reverse (4611115311), we get a palindrome (15962226951).

The spelling of 11351111640 in words is "eleven billion, three hundred fifty-one million, one hundred eleven thousand, six hundred forty".