124838197640 has 128 divisors (see below), whose sum is σ = 306533052000. Its totient is φ = 45753237504.

The previous prime is 124838197637. The next prime is 124838197709. The reversal of 124838197640 is 46791838421.

It can be written as a sum of positive squares in 16 ways, for example, as 75052985764 + 49785211876 = 273958^2 + 223126^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12034376 + ... + 12044744.

Almost surely, 2^124838197640 is an apocalyptic number.

124838197640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 124838197640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153266526000).

124838197640 is an abundant number, since it is smaller than the sum of its proper divisors (181694854360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124838197640 is a wasteful number, since it uses less digits than its factorization.

124838197640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556 (or 10526 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 53.

The spelling of 124838197640 in words is "one hundred twenty-four billion, eight hundred thirty-eight million, one hundred ninety-seven thousand, six hundred forty".