125905392809279 has 8 divisors (see below), whose sum is σ = 134704648045680. Its totient is φ = 117323403134400.

The previous prime is 125905392809237. The next prime is 125905392809299. The reversal of 125905392809279 is 972908293509521.

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

It is a cyclic number.

It is not a de Polignac number, because 125905392809279 - 2¹² = 125905392805183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125905392809299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54316389182 + ... + 54316391499.

It is an arithmetic number, because the mean of its divisors is an integer number (16838081005710).

Almost surely, 2^{125905392809279} is an apocalyptic number.

125905392809279 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125905392809279 is a deficient number, since it is larger than the sum of its proper divisors (8799255236401).

125905392809279 is a wasteful number, since it uses less digits than its factorization.

125905392809279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108632780761.

The product of its (nonzero) digits is 220449600, while the sum is 71.

The spelling of 125905392809279 in words is "one hundred twenty-five trillion, nine hundred five billion, three hundred ninety-two million, eight hundred nine thousand, two hundred seventy-nine".