124778868481 has 16 divisors (see below), whose sum is σ = 127659493456. Its totient is φ = 121927680000.

The previous prime is 124778868437. The next prime is 124778868593. The reversal of 124778868481 is 184868877421.

It can be written as a sum of positive squares in 8 ways, for example, as 23660592400 + 101118276081 = 153820^2 + 317991^2 .

It is a 4-Lehmer number, since φ(124778868481) divides (124778868481-1)⁴.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 124778868481 - 2¹⁷ = 124778737409 is a prime.

It is a super-3 number, since 3×124778868481³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a deceptive number, since it divides R_124778868480.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (124772868481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6179041 + ... + 6199201.

It is an arithmetic number, because the mean of its divisors is an integer number (7978718341).

It is a Poulet number, since it divides 2^124778868480-1.

Almost surely, 2^124778868481 is an apocalyptic number.

It is an amenable number.

124778868481 is a deficient number, since it is larger than the sum of its proper divisors (2880624975).

124778868481 is a wasteful number, since it uses less digits than its factorization.

124778868481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20884.

The product of its digits is 38535168, while the sum is 64.

The spelling of 124778868481 in words is "one hundred twenty-four billion, seven hundred seventy-eight million, eight hundred sixty-eight thousand, four hundred eighty-one".