10642544640 has 1152 divisors, whose sum is σ = 48080148480. Its totient is φ = 2197684224.

The previous prime is 10642544569. The next prime is 10642544681. The reversal of 10642544640 is 4644524601.

10642544640 is a `hidden beast` number, since 1 + 0 + 6 + 4 + 2 + 5 + 4 + 4 + 640 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a super-2 number, since 2×10642544640² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 10642544595 and 10642544604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 226437097 + ... + 226437143.

It is an arithmetic number, because the mean of its divisors is an integer number (41736240).

Almost surely, 2^10642544640 is an apocalyptic number.

10642544640 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 10642544640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24040074240).

10642544640 is an abundant number, since it is smaller than the sum of its proper divisors (37437603840).

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

10642544640 is an equidigital number, since it uses as much as digits as its factorization.

10642544640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The spelling of 10642544640 in words is "ten billion, six hundred forty-two million, five hundred forty-four thousand, six hundred forty".