1635012428139 has 20 divisors (see below), whose sum is σ = 2444846735320. Its totient is φ = 1088927945280.

The previous prime is 1635012428117. The next prime is 1635012428197. The reversal of 1635012428139 is 9318242105361.

1635012428139 is a `hidden beast` number, since 1 + 6 + 3 + 501 + 2 + 4 + 2 + 8 + 139 = 666.

It is not a de Polignac number, because 1635012428139 - 2¹⁶ = 1635012362603 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1635012428094 and 1635012428103.

It is not an unprimeable number, because it can be changed into a prime (1635012428239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9920917 + ... + 10084374.

It is an arithmetic number, because the mean of its divisors is an integer number (122242336766).

Almost surely, 2^{1635012428139} is an apocalyptic number.

1635012428139 is a deficient number, since it is larger than the sum of its proper divisors (809834307181).

1635012428139 is a wasteful number, since it uses less digits than its factorization.

1635012428139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20006312 (or 20006303 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 1635012428139 in words is "one trillion, six hundred thirty-five billion, twelve million, four hundred twenty-eight thousand, one hundred thirty-nine".