11390494640 has 80 divisors (see below), whose sum is σ = 30295114560. Its totient is φ = 3901578240.

The previous prime is 11390494639. The next prime is 11390494667. The reversal of 11390494640 is 4649409311.

It is a tau number, because it is divible by the number of its divisors (80).

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, 611870 + ... + 630210.

It is an arithmetic number, because the mean of its divisors is an integer number (378688932).

Almost surely, 2^11390494640 is an apocalyptic number.

11390494640 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 11390494640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15147557280).

11390494640 is an abundant number, since it is smaller than the sum of its proper divisors (18904619920).

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

11390494640 is a wasteful number, since it uses less digits than its factorization.

11390494640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19470 (or 19464 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 41.

The spelling of 11390494640 in words is "eleven billion, three hundred ninety million, four hundred ninety-four thousand, six hundred forty".