7896780865 has 8 divisors (see below), whose sum is σ = 9496431360. Its totient is φ = 6303895152.

The previous prime is 7896780799. The next prime is 7896780883. The reversal of 7896780865 is 5680876987.

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 7896780865 - 2¹³ = 7896772673 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7896780797 and 7896780806.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1688625 + ... + 1693294.

It is an arithmetic number, because the mean of its divisors is an integer number (1187053920).

Almost surely, 2^7896780865 is an apocalyptic number.

It is an amenable number.

7896780865 is a deficient number, since it is larger than the sum of its proper divisors (1599650495).

7896780865 is a wasteful number, since it uses less digits than its factorization.

7896780865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382391.

The product of its (nonzero) digits is 40642560, while the sum is 64.

The square root of 7896780865 is about 88863.8332787867. The cubic root of 7896780865 is about 1991.3611442285.

The spelling of 7896780865 in words is "seven billion, eight hundred ninety-six million, seven hundred eighty thousand, eight hundred sixty-five".