1975861768 has 16 divisors (see below), whose sum is σ = 3710997180. Its totient is φ = 986262528.

The previous prime is 1975861763. The next prime is 1975861777. The reversal of 1975861768 is 8671685791.

It can be written as a sum of positive squares in 2 ways, for example, as 1957354564 + 18507204 = 44242^2 + 4302^2 .

It is not an unprimeable number, because it can be changed into a prime (1975861763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203505 + ... + 212992.

Almost surely, 2^1975861768 is an apocalyptic number.

It is an amenable number.

1975861768 is a deficient number, since it is larger than the sum of its proper divisors (1735135412).

1975861768 is a wasteful number, since it uses less digits than its factorization.

1975861768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417096 (or 417092 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 58.

The square root of 1975861768 is about 44450.6666766653. Note that the first 4 decimals coincide. The cubic root of 1975861768 is about 1254.8318093364.

The spelling of 1975861768 in words is "one billion, nine hundred seventy-five million, eight hundred sixty-one thousand, seven hundred sixty-eight".