7899654401 has 8 divisors (see below), whose sum is σ = 8590403880. Its totient is φ = 7234023168.

The previous prime is 7899654383. The next prime is 7899654403. The reversal of 7899654401 is 1044569987.

It is a Cunningham number, because it is equal to 88880²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3674784400 + 4224870001 = 60620^2 + 64999^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 7899654401 - 2¹⁴ = 7899638017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7899654403) 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, 6278906 + ... + 6280163.

It is an arithmetic number, because the mean of its divisors is an integer number (1073800485).

Almost surely, 2^7899654401 is an apocalyptic number.

It is an amenable number.

7899654401 is a deficient number, since it is larger than the sum of its proper divisors (690749479).

7899654401 is a wasteful number, since it uses less digits than its factorization.

7899654401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12559123.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 7899654401 is about 88880.0000056256. Note that the first 5 decimals coincide. The cubic root of 7899654401 is about 1991.6026584223.

The spelling of 7899654401 in words is "seven billion, eight hundred ninety-nine million, six hundred fifty-four thousand, four hundred one".