11631352640 has 56 divisors (see below), whose sum is σ = 27750516000. Its totient is φ = 4643578368.

The previous prime is 11631352583. The next prime is 11631352651. The reversal of 11631352640 is 4625313611.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 11631352597 and 11631352606.

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, 132611 + ... + 202109.

Almost surely, 2^11631352640 is an apocalyptic number.

11631352640 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 11631352640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13875258000).

11631352640 is an abundant number, since it is smaller than the sum of its proper divisors (16119163360).

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

11631352640 is an equidigital number, since it uses as much as digits as its factorization.

11631352640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70039 (or 70029 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 11631352640 in words is "eleven billion, six hundred thirty-one million, three hundred fifty-two thousand, six hundred forty".