9895777801 has 12 divisors (see below), whose sum is σ = 12396909252. Its totient is φ = 7829625888.

The previous prime is 9895777777. The next prime is 9895777811. The reversal of 9895777801 is 1087775989.

It can be written as a sum of positive squares in 2 ways, for example, as 4369342201 + 5526435600 = 66101^2 + 74340^2 .

It is not a de Polignac number, because 9895777801 - 2¹⁹ = 9895253513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9895777801.

It is not an unprimeable number, because it can be changed into a prime (9895777811) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7766850 + ... + 7768123.

It is an arithmetic number, because the mean of its divisors is an integer number (1033075771).

Almost surely, 2^9895777801 is an apocalyptic number.

9895777801 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

9895777801 is a deficient number, since it is larger than the sum of its proper divisors (2501131451).

9895777801 is a wasteful number, since it uses less digits than its factorization.

9895777801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15535000 (or 15534993 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 61.

The square root of 9895777801 is about 99477.5240996679. The cubic root of 9895777801 is about 2146.9238721167.

The spelling of 9895777801 in words is "nine billion, eight hundred ninety-five million, seven hundred seventy-seven thousand, eight hundred one".