126211278192505 has 16 divisors (see below), whose sum is σ = 172405603730304. Its totient is φ = 87799150046080.

The previous prime is 126211278192499. The next prime is 126211278192529. The reversal of 126211278192505 is 505291872112621.

It is not a de Polignac number, because 126211278192505 - 2¹⁷ = 126211278061433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49885879444 + ... + 49885881973.

It is an arithmetic number, because the mean of its divisors is an integer number (10775350233144).

Almost surely, 2^{126211278192505} is an apocalyptic number.

It is an amenable number.

126211278192505 is a deficient number, since it is larger than the sum of its proper divisors (46194325537799).

126211278192505 is a wasteful number, since it uses less digits than its factorization.

126211278192505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99771761456.

The product of its (nonzero) digits is 1209600, while the sum is 52.

The spelling of 126211278192505 in words is "one hundred twenty-six trillion, two hundred eleven billion, two hundred seventy-eight million, one hundred ninety-two thousand, five hundred five".