122551004656 has 20 divisors (see below), whose sum is σ = 239150795800. Its totient is φ = 60834670272.

The previous prime is 122551004651. The next prime is 122551004657. The reversal of 122551004656 is 656400155221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122551004651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27549711 + ... + 27554158.

It is an arithmetic number, because the mean of its divisors is an integer number (11957539790).

Almost surely, 2^122551004656 is an apocalyptic number.

122551004656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

122551004656 is a deficient number, since it is larger than the sum of its proper divisors (116599791144).

122551004656 is a wasteful number, since it uses less digits than its factorization.

122551004656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55104016 (or 55104010 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

Adding to 122551004656 its reverse (656400155221), we get a palindrome (778951159877).

The spelling of 122551004656 in words is "one hundred twenty-two billion, five hundred fifty-one million, four thousand, six hundred fifty-six".