124892984855809 has 27 divisors (see below), whose sum is σ = 132286134748131. Its totient is φ = 117895825840320.

The previous prime is 124892984855791. The next prime is 124892984855833. The reversal of 124892984855809 is 908558489298421.

The square root of 124892984855809 is 11175553.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 63291332692225 + 61601652163584 = 7955585^2 + 7848672^2 .

It is not a de Polignac number, because 124892984855809 - 2¹⁵ = 124892984823041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124892984858809) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 70283051929 + ... + 70283053705.

It is an arithmetic number, because the mean of its divisors is an integer number (4899486472153).

Almost surely, 2^{124892984855809} is an apocalyptic number.

124892984855809 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

124892984855809 is the 11175553-rd square number.

124892984855809 is the 5587777-th centered octagonal number.

It is an amenable number.

124892984855809 is a deficient number, since it is larger than the sum of its proper divisors (7393149892322).

124892984855809 is an frugal number, since it uses more digits than its factorization.

124892984855809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4254 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 4777574400, while the sum is 82.

The spelling of 124892984855809 in words is "one hundred twenty-four trillion, eight hundred ninety-two billion, nine hundred eighty-four million, eight hundred fifty-five thousand, eight hundred nine".