13785503979 has 32 divisors (see below), whose sum is σ = 20869515520. Its totient is φ = 8024116608.

The previous prime is 13785503971. The next prime is 13785503999. The reversal of 13785503979 is 97930558731.

It is not a de Polignac number, because 13785503979 - 2³ = 13785503971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13785503971) by changing a digit.

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, 461997 + ... + 490929.

It is an arithmetic number, because the mean of its divisors is an integer number (652172360).

Almost surely, 2^13785503979 is an apocalyptic number.

13785503979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

13785503979 is a deficient number, since it is larger than the sum of its proper divisors (7084011541).

13785503979 is a wasteful number, since it uses less digits than its factorization.

13785503979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29611.

The product of its (nonzero) digits is 7144200, while the sum is 57.

The spelling of 13785503979 in words is "thirteen billion, seven hundred eighty-five million, five hundred three thousand, nine hundred seventy-nine".