7900591018401 has 15 divisors (see below), whose sum is σ = 11802155236993. Its totient is φ = 5267043814140.

The previous prime is 7900591018393. The next prime is 7900591018403. The reversal of 7900591018401 is 1048101950097.

It is a happy number.

The square root of 7900591018401 is 2810799.

It is a perfect power (a square), and thus also a powerful number.

7900591018401 is a `hidden beast` number, since 7 + 9 + 0 + 0 + 591 + 0 + 18 + 40 + 1 = 666.

It is not a de Polignac number, because 7900591018401 - 2³ = 7900591018393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7900591018403) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 25141036 + ... + 25453346.

Almost surely, 2^{7900591018401} is an apocalyptic number.

7900591018401 is the 2810799-th square number.

7900591018401 is the 1405400-th centered octagonal number.

It is an amenable number.

7900591018401 is a deficient number, since it is larger than the sum of its proper divisors (3901564218592).

7900591018401 is an frugal number, since it uses more digits than its factorization.

7900591018401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624634 (or 312314 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 45.

Adding to 7900591018401 its reverse (1048101950097), we get a palindrome (8948692968498).

The spelling of 7900591018401 in words is "seven trillion, nine hundred billion, five hundred ninety-one million, eighteen thousand, four hundred one".