1975881616 has 20 divisors (see below), whose sum is σ = 3844995100. Its totient is φ = 983624832.

The previous prime is 1975881577. The next prime is 1975881617. The reversal of 1975881616 is 6161885791.

It can be written as a sum of positive squares in 2 ways, for example, as 930006016 + 1045875600 = 30496^2 + 32340^2 .

It is not an unprimeable number, because it can be changed into a prime (1975881617) 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, 265971 + ... + 273298.

It is an arithmetic number, because the mean of its divisors is an integer number (192249755).

Almost surely, 2^1975881616 is an apocalyptic number.

1975881616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1975881616 is a deficient number, since it is larger than the sum of its proper divisors (1869113484).

1975881616 is a wasteful number, since it uses less digits than its factorization.

1975881616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539506 (or 539500 counting only the distinct ones).

The product of its digits is 725760, while the sum is 52.

The square root of 1975881616 is about 44450.8899348483. The cubic root of 1975881616 is about 1254.8360110167.

The spelling of 1975881616 in words is "one billion, nine hundred seventy-five million, eight hundred eighty-one thousand, six hundred sixteen".