7990056401 has 4 divisors (see below), whose sum is σ = 8023210404. Its totient is φ = 7956902400.

The previous prime is 7990056359. The next prime is 7990056409. The reversal of 7990056401 is 1046500997.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3614895376 + 4375161025 = 60124^2 + 66145^2 .

It is a cyclic number.

It is not a de Polignac number, because 7990056401 - 2¹⁰ = 7990055377 is a prime.

It is a super-2 number, since 2×7990056401² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7990056409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16576640 + ... + 16577121.

It is an arithmetic number, because the mean of its divisors is an integer number (2005802601).

Almost surely, 2^7990056401 is an apocalyptic number.

It is an amenable number.

7990056401 is a deficient number, since it is larger than the sum of its proper divisors (33154003).

7990056401 is a wasteful number, since it uses less digits than its factorization.

7990056401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33154002.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 7990056401 is about 89387.1154082063. The cubic root of 7990056401 is about 1999.1710231962.

The spelling of 7990056401 in words is "seven billion, nine hundred ninety million, fifty-six thousand, four hundred one".