7904148643 has 4 divisors (see below), whose sum is σ = 8117774320. Its totient is φ = 7690522968.

The previous prime is 7904148617. The next prime is 7904148661. The reversal of 7904148643 is 3468414097.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3468414097 = 449 ⋅7724753.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7904148643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7904148593 and 7904148602.

It is not an unprimeable number, because it can be changed into a prime (7904148613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106812783 + ... + 106812856.

It is an arithmetic number, because the mean of its divisors is an integer number (2029443580).

Almost surely, 2^7904148643 is an apocalyptic number.

7904148643 is a deficient number, since it is larger than the sum of its proper divisors (213625677).

7904148643 is a wasteful number, since it uses less digits than its factorization.

7904148643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213625676.

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 7904148643 is about 88905.2790502341. The cubic root of 7904148643 is about 1991.9802718802.

The spelling of 7904148643 in words is "seven billion, nine hundred four million, one hundred forty-eight thousand, six hundred forty-three".