808749007961 has 8 divisors (see below), whose sum is σ = 813484075464. Its totient is φ = 804014632960.

The previous prime is 808749007951. The next prime is 808749007973. The reversal of 808749007961 is 169700947808.

It can be written as a sum of positive squares in 4 ways, for example, as 177804745561 + 630944262400 = 421669^2 + 794320^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-808749007961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 808749007961.

It is not an unprimeable number, because it can be changed into a prime (808749007931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2270015 + ... + 2602011.

It is an arithmetic number, because the mean of its divisors is an integer number (101685509433).

Almost surely, 2^808749007961 is an apocalyptic number.

It is an amenable number.

808749007961 is a deficient number, since it is larger than the sum of its proper divisors (4735067503).

808749007961 is a wasteful number, since it uses less digits than its factorization.

808749007961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346251.

The product of its (nonzero) digits is 6096384, while the sum is 59.

The spelling of 808749007961 in words is "eight hundred eight billion, seven hundred forty-nine million, seven thousand, nine hundred sixty-one".