2758197897 has 36 divisors (see below), whose sum is σ = 4991035140. Its totient is φ = 1454870592.

The previous prime is 2758197889. The next prime is 2758197907. The reversal of 2758197897 is 7987918572.

It can be written as a sum of positive squares in 2 ways, for example, as 915728121 + 1842469776 = 30261^2 + 42924^2 .

It is not a de Polignac number, because 2758197897 - 2³ = 2758197889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2758197877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 234822 + ... + 246287.

It is an arithmetic number, because the mean of its divisors is an integer number (138639865).

Almost surely, 2^2758197897 is an apocalyptic number.

It is an amenable number.

2758197897 is a deficient number, since it is larger than the sum of its proper divisors (2232837243).

2758197897 is a wasteful number, since it uses less digits than its factorization.

2758197897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481142 (or 481132 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 63.

The square root of 2758197897 is about 52518.5481234963. The cubic root of 2758197897 is about 1402.4104557394.

The spelling of 2758197897 in words is "two billion, seven hundred fifty-eight million, one hundred ninety-seven thousand, eight hundred ninety-seven".