1975738857 has 8 divisors (see below), whose sum is σ = 2663917920. Its totient is φ = 1302359520.

The previous prime is 1975738837. The next prime is 1975738937. The reversal of 1975738857 is 7588375791.

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

It is not a de Polignac number, because 1975738857 - 2⁸ = 1975738601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1975738857.

It is not an unprimeable number, because it can be changed into a prime (1975738837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3699619 + ... + 3700152.

It is an arithmetic number, because the mean of its divisors is an integer number (332989740).

Almost surely, 2^1975738857 is an apocalyptic number.

It is an amenable number.

1975738857 is a deficient number, since it is larger than the sum of its proper divisors (688179063).

1975738857 is an equidigital number, since it uses as much as digits as its factorization.

1975738857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7399863.

The product of its digits is 14817600, while the sum is 60.

The square root of 1975738857 is about 44449.2840999717. The cubic root of 1975738857 is about 1254.8057893261.

The spelling of 1975738857 in words is "one billion, nine hundred seventy-five million, seven hundred thirty-eight thousand, eight hundred fifty-seven".