9975819901 has 16 divisors (see below), whose sum is σ = 10282235904. Its totient is φ = 9674368704.

The previous prime is 9975819863. The next prime is 9975819937. The reversal of 9975819901 is 1099185799.

It is a happy number.

9975819901 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9975819901 - 2⁷ = 9975819773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9975819991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1902255 + ... + 1907491.

It is an arithmetic number, because the mean of its divisors is an integer number (642639744).

Almost surely, 2^9975819901 is an apocalyptic number.

It is an amenable number.

9975819901 is a deficient number, since it is larger than the sum of its proper divisors (306416003).

9975819901 is a wasteful number, since it uses less digits than its factorization.

9975819901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5700.

The product of its (nonzero) digits is 1837080, while the sum is 58.

The square root of 9975819901 is about 99879.0263318581. The cubic root of 9975819901 is about 2152.6968070691.

The spelling of 9975819901 in words is "nine billion, nine hundred seventy-five million, eight hundred nineteen thousand, nine hundred one".