1125921369639 has 8 divisors (see below), whose sum is σ = 1637703810432. Its totient is φ = 682376587640.

The previous prime is 1125921369613. The next prime is 1125921369647. The reversal of 1125921369639 is 9369631295211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1125921369639 - 2⁷ = 1125921369511 is a prime.

It is a super-4 number, since 4×1125921369639⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125921369659) 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, 17059414659 + ... + 17059414724.

It is an arithmetic number, because the mean of its divisors is an integer number (204712976304).

Almost surely, 2^{1125921369639} is an apocalyptic number.

1125921369639 is a deficient number, since it is larger than the sum of its proper divisors (511782440793).

1125921369639 is a wasteful number, since it uses less digits than its factorization.

1125921369639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34118829397.

The product of its digits is 4723920, while the sum is 57.

The spelling of 1125921369639 in words is "one trillion, one hundred twenty-five billion, nine hundred twenty-one million, three hundred sixty-nine thousand, six hundred thirty-nine".