154981647812 has 12 divisors (see below), whose sum is σ = 271348984620. Its totient is φ = 77453366496.

The previous prime is 154981647809. The next prime is 154981647817. The reversal of 154981647812 is 218746189451.

It can be written as a sum of positive squares in 2 ways, for example, as 29314233796 + 125667414016 = 171214^2 + 354496^2 .

It is a super-2 number, since 2×154981647812² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (154981647817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9355043 + ... + 9371594.

It is an arithmetic number, because the mean of its divisors is an integer number (22612415385).

Almost surely, 2^154981647812 is an apocalyptic number.

It is an amenable number.

154981647812 is a deficient number, since it is larger than the sum of its proper divisors (116367336808).

154981647812 is a wasteful number, since it uses less digits than its factorization.

154981647812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18728710 (or 18728708 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 56.

The spelling of 154981647812 in words is "one hundred fifty-four billion, nine hundred eighty-one million, six hundred forty-seven thousand, eight hundred twelve".