11552557640 has 32 divisors (see below), whose sum is σ = 27992737080. Its totient is φ = 4265559552.

The previous prime is 11552557637. The next prime is 11552557661. The reversal of 11552557640 is 4675525511.

It can be written as a sum of positive squares in 4 ways, for example, as 7279843684 + 4272713956 = 85322^2 + 65366^2 .

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, 11107709 + ... + 11108748.

Almost surely, 2^11552557640 is an apocalyptic number.

11552557640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11552557640 is an abundant number, since it is smaller than the sum of its proper divisors (16440179440).

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

11552557640 is a wasteful number, since it uses less digits than its factorization.

11552557640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22216481 (or 22216477 counting only the distinct ones).

The product of its (nonzero) digits is 210000, while the sum is 41.

The spelling of 11552557640 in words is "eleven billion, five hundred fifty-two million, five hundred fifty-seven thousand, six hundred forty".