11551604554 has 16 divisors (see below), whose sum is σ = 19840627008. Its totient is φ = 4941218592.

The previous prime is 11551604549. The next prime is 11551604569. The reversal of 11551604554 is 45540615511.

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, 781507 + ... + 796150.

It is an arithmetic number, because the mean of its divisors is an integer number (1240039188).

Almost surely, 2^11551604554 is an apocalyptic number.

11551604554 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11551604554 is a deficient number, since it is larger than the sum of its proper divisors (8289022454).

11551604554 is a wasteful number, since it uses less digits than its factorization.

11551604554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1578189.

The product of its (nonzero) digits is 60000, while the sum is 37.

The spelling of 11551604554 in words is "eleven billion, five hundred fifty-one million, six hundred four thousand, five hundred fifty-four".