13778775125 has 16 divisors (see below), whose sum is σ = 17413593600. Its totient is φ = 10883480400.

The previous prime is 13778775121. The next prime is 13778775139. The reversal of 13778775125 is 52157787731.

It is not a de Polignac number, because 13778775125 - 2² = 13778775121 is a prime.

It is a super-3 number, since 3×13778775125³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13778775121) 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, 687785 + ... + 707534.

It is an arithmetic number, because the mean of its divisors is an integer number (1088349600).

Almost surely, 2^13778775125 is an apocalyptic number.

It is an amenable number.

13778775125 is a deficient number, since it is larger than the sum of its proper divisors (3634818475).

13778775125 is an equidigital number, since it uses as much as digits as its factorization.

13778775125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395413 (or 1395403 counting only the distinct ones).

The product of its digits is 2881200, while the sum is 53.

The spelling of 13778775125 in words is "thirteen billion, seven hundred seventy-eight million, seven hundred seventy-five thousand, one hundred twenty-five".