2188628745 has 8 divisors (see below), whose sum is σ = 3501806016. Its totient is φ = 1167268656.

The previous prime is 2188628731. The next prime is 2188628759. The reversal of 2188628745 is 5478268812.

It is an interprime number because it is at equal distance from previous prime (2188628731) and next prime (2188628759).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2188628745 - 2⁵ = 2188628713 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72954277 + ... + 72954306.

It is an arithmetic number, because the mean of its divisors is an integer number (437725752).

Almost surely, 2^2188628745 is an apocalyptic number.

It is an amenable number.

2188628745 is a deficient number, since it is larger than the sum of its proper divisors (1313177271).

2188628745 is a wasteful number, since it uses less digits than its factorization.

2188628745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145908591.

The product of its digits is 1720320, while the sum is 51.

The square root of 2188628745 is about 46782.7825700866. The cubic root of 2188628745 is about 1298.3467633278.

The spelling of 2188628745 in words is "two billion, one hundred eighty-eight million, six hundred twenty-eight thousand, seven hundred forty-five".