11215334640 has 40 divisors (see below), whose sum is σ = 34767538128. Its totient is φ = 2990755840.

The previous prime is 11215334629. The next prime is 11215334651. The reversal of 11215334640 is 4643351211.

It is an interprime number because it is at equal distance from previous prime (11215334629) and next prime (11215334651).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 11215334598 and 11215334607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23365041 + ... + 23365520.

Almost surely, 2^11215334640 is an apocalyptic number.

11215334640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11215334640 is an abundant number, since it is smaller than the sum of its proper divisors (23552203488).

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

11215334640 is a wasteful number, since it uses less digits than its factorization.

11215334640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46730577 (or 46730571 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 11215334640 its reverse (4643351211), we get a palindrome (15858685851).

The spelling of 11215334640 in words is "eleven billion, two hundred fifteen million, three hundred thirty-four thousand, six hundred forty".