2688136425 has 36 divisors (see below), whose sum is σ = 5185122124. Its totient is φ = 1323388800.

The previous prime is 2688136421. The next prime is 2688136427. The reversal of 2688136425 is 5246318862.

2688136425 is a `hidden beast` number, since 268 + 8 + 1 + 364 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 161264601 + 2526871824 = 12699^2 + 50268^2 .

It is not a de Polignac number, because 2688136425 - 2² = 2688136421 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2688136421) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 456586 + ... + 462435.

Almost surely, 2^2688136425 is an apocalyptic number.

2688136425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2688136425 is a deficient number, since it is larger than the sum of its proper divisors (2496985699).

2688136425 is a wasteful number, since it uses less digits than its factorization.

2688136425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919050 (or 919042 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 2688136425 is about 51847.2412477270. The cubic root of 2688136425 is about 1390.4341802221.

The spelling of 2688136425 in words is "two billion, six hundred eighty-eight million, one hundred thirty-six thousand, four hundred twenty-five".