1975999641 has 48 divisors (see below), whose sum is σ = 3489484800. Its totient is φ = 966078720.

The previous prime is 1975999637. The next prime is 1975999643. The reversal of 1975999641 is 1469995791.

It is not a de Polignac number, because 1975999641 - 2² = 1975999637 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1975999643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51960 + ... + 81558.

It is an arithmetic number, because the mean of its divisors is an integer number (72697600).

Almost surely, 2^1975999641 is an apocalyptic number.

1975999641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1975999641 is a deficient number, since it is larger than the sum of its proper divisors (1513485159).

1975999641 is a wasteful number, since it uses less digits than its factorization.

1975999641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29654 (or 29637 counting only the distinct ones).

The product of its digits is 5511240, while the sum is 60.

The square root of 1975999641 is about 44452.2175037422. The cubic root of 1975999641 is about 1254.8609954878.

The spelling of 1975999641 in words is "one billion, nine hundred seventy-five million, nine hundred ninety-nine thousand, six hundred forty-one".