11478550988 has 12 divisors (see below), whose sum is σ = 20129403840. Its totient is φ = 5727292752.

The previous prime is 11478550907. The next prime is 11478551003. The reversal of 11478550988 is 88905587411.

It is a super-2 number, since 2×11478550988² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2993531 + ... + 2997362.

It is an arithmetic number, because the mean of its divisors is an integer number (1677450320).

Almost surely, 2^11478550988 is an apocalyptic number.

It is an amenable number.

11478550988 is a deficient number, since it is larger than the sum of its proper divisors (8650852852).

11478550988 is a wasteful number, since it uses less digits than its factorization.

11478550988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991376 (or 5991374 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 56.

Adding to 11478550988 its sum of digits (56), we get a square (11478551044 = 107138²).

The spelling of 11478550988 in words is "eleven billion, four hundred seventy-eight million, five hundred fifty thousand, nine hundred eighty-eight".