11471507664 has 160 divisors (see below), whose sum is σ = 30923735040. Its totient is φ = 3661894656.

The previous prime is 11471507569. The next prime is 11471507681. The reversal of 11471507664 is 46670517411.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28047492 + ... + 28047900.

It is an arithmetic number, because the mean of its divisors is an integer number (193273344).

Almost surely, 2^11471507664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11471507664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15461867520).

11471507664 is an abundant number, since it is smaller than the sum of its proper divisors (19452227376).

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

11471507664 is a wasteful number, since it uses less digits than its factorization.

11471507664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 11471507664 in words is "eleven billion, four hundred seventy-one million, five hundred seven thousand, six hundred sixty-four".