1225137738168 has 64 divisors (see below), whose sum is σ = 3486164320800. Its totient is φ = 398418773760.

The previous prime is 1225137738137. The next prime is 1225137738173. The reversal of 1225137738168 is 8618377315221.

1225137738168 is a `hidden beast` number, since 1 + 2 + 251 + 3 + 7 + 7 + 381 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69161071 + ... + 69178782.

Almost surely, 2^{1225137738168} is an apocalyptic number.

1225137738168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1225137738168 is an abundant number, since it is smaller than the sum of its proper divisors (2261026582632).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1225137738168 is a wasteful number, since it uses less digits than its factorization.

1225137738168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138339909 (or 138339899 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 1225137738168 in words is "one trillion, two hundred twenty-five billion, one hundred thirty-seven million, seven hundred thirty-eight thousand, one hundred sixty-eight".