129954756145 has 4 divisors (see below), whose sum is σ = 155945707380. Its totient is φ = 103963804912.

The previous prime is 129954756131. The next prime is 129954756187. The reversal of 129954756145 is 541657459921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60275651121 + 69679105024 = 245511^2 + 263968^2 .

It is a cyclic number.

It is not a de Polignac number, because 129954756145 - 2⁹ = 129954755633 is a prime.

It is a super-2 number, since 2×129954756145² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 129954756145.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12995475610 + ... + 12995475619.

It is an arithmetic number, because the mean of its divisors is an integer number (38986426845).

Almost surely, 2^129954756145 is an apocalyptic number.

It is an amenable number.

129954756145 is a deficient number, since it is larger than the sum of its proper divisors (25990951235).

129954756145 is an equidigital number, since it uses as much as digits as its factorization.

129954756145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25990951234.

The product of its digits is 13608000, while the sum is 58.

The spelling of 129954756145 in words is "one hundred twenty-nine billion, nine hundred fifty-four million, seven hundred fifty-six thousand, one hundred forty-five".