111451621604 has 24 divisors (see below), whose sum is σ = 198256878456. Its totient is φ = 54806976000.

The previous prime is 111451621577. The next prime is 111451621609. The reversal of 111451621604 is 406126154111.

It can be written as a sum of positive squares in 4 ways, for example, as 3011814400 + 108439807204 = 54880^2 + 329302^2 .

It is a super-2 number, since 2×111451621604² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111451621609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4027094 + ... + 4054674.

It is an arithmetic number, because the mean of its divisors is an integer number (8260703269).

Almost surely, 2^111451621604 is an apocalyptic number.

It is an amenable number.

111451621604 is a deficient number, since it is larger than the sum of its proper divisors (86805256852).

111451621604 is a wasteful number, since it uses less digits than its factorization.

111451621604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44207 (or 44205 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

Adding to 111451621604 its reverse (406126154111), we get a palindrome (517577775715).

The spelling of 111451621604 in words is "one hundred eleven billion, four hundred fifty-one million, six hundred twenty-one thousand, six hundred four".