7945663401 has 12 divisors (see below), whose sum is σ = 12359921028. Its totient is φ = 4889638944.

The previous prime is 7945663387. The next prime is 7945663417. The reversal of 7945663401 is 1043665497.

7945663401 is a `hidden beast` number, since 7 + 9 + 4 + 5 + 6 + 634 + 0 + 1 = 666.

7945663401 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1278777600 + 6666885801 = 35760^2 + 81651^2 .

It is not a de Polignac number, because 7945663401 - 2⁹ = 7945662889 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7945663001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33955710 + ... + 33955943.

It is an arithmetic number, because the mean of its divisors is an integer number (1029993419).

Almost surely, 2^7945663401 is an apocalyptic number.

It is an amenable number.

7945663401 is a deficient number, since it is larger than the sum of its proper divisors (4414257627).

7945663401 is a wasteful number, since it uses less digits than its factorization.

7945663401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67911672 (or 67911669 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 7945663401 is about 89138.4507437727. The cubic root of 7945663401 is about 1995.4616596061.

The spelling of 7945663401 in words is "seven billion, nine hundred forty-five million, six hundred sixty-three thousand, four hundred one".