11528691580 has 72 divisors (see below), whose sum is σ = 29387479968. Its totient is φ = 3780830592.

The previous prime is 11528691571. The next prime is 11528691589. The reversal of 11528691580 is 8519682511.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11528691571) and next prime (11528691589).

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 11528691580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11528691589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 233199 + ... + 278278.

It is an arithmetic number, because the mean of its divisors is an integer number (408159444).

Almost surely, 2^11528691580 is an apocalyptic number.

11528691580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11528691580 is an abundant number, since it is smaller than the sum of its proper divisors (17858788388).

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

11528691580 is a wasteful number, since it uses less digits than its factorization.

11528691580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511523 (or 511514 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 46.

The spelling of 11528691580 in words is "eleven billion, five hundred twenty-eight million, six hundred ninety-one thousand, five hundred eighty".