11551781354 has 16 divisors (see below), whose sum is σ = 18107895168. Its totient is φ = 5521532352.

The previous prime is 11551781341. The next prime is 11551781357. The reversal of 11551781354 is 45318715511.

It is not an unprimeable number, because it can be changed into a prime (11551781357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1424927 + ... + 1433010.

It is an arithmetic number, because the mean of its divisors is an integer number (1131743448).

Almost surely, 2^11551781354 is an apocalyptic number.

11551781354 is a deficient number, since it is larger than the sum of its proper divisors (6556113814).

11551781354 is a wasteful number, since it uses less digits than its factorization.

11551781354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858029.

The product of its digits is 84000, while the sum is 41.

The spelling of 11551781354 in words is "eleven billion, five hundred fifty-one million, seven hundred eighty-one thousand, three hundred fifty-four".