9809746651 has 2 divisors, whose sum is σ = 9809746652. Its totient is φ = 9809746650.

The previous prime is 9809746601. The next prime is 9809746669. The reversal of 9809746651 is 1566479089.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9809746651 - 2²³ = 9801358043 is a prime.

It is a super-2 number, since 2×9809746651² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9809746592 and 9809746601.

It is not a weakly prime, because it can be changed into another prime (9809746601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4904873325 + 4904873326.

It is an arithmetic number, because the mean of its divisors is an integer number (4904873326).

Almost surely, 2^9809746651 is an apocalyptic number.

9809746651 is a deficient number, since it is larger than the sum of its proper divisors (1).

9809746651 is an equidigital number, since it uses as much as digits as its factorization.

9809746651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 9809746651 is about 99044.1651537333. The cubic root of 9809746651 is about 2140.6841678727.

The spelling of 9809746651 in words is "nine billion, eight hundred nine million, seven hundred forty-six thousand, six hundred fifty-one".