7878898651 has 16 divisors (see below), whose sum is σ = 8773712640. Its totient is φ = 7026140160.

The previous prime is 7878898579. The next prime is 7878898661. The reversal of 7878898651 is 1568988787.

It is not a de Polignac number, because 7878898651 - 2²⁹ = 7342027739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7878898661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222495 + ... + 255463.

It is an arithmetic number, because the mean of its divisors is an integer number (548357040).

Almost surely, 2^7878898651 is an apocalyptic number.

7878898651 is a deficient number, since it is larger than the sum of its proper divisors (894813989).

7878898651 is a wasteful number, since it uses less digits than its factorization.

7878898651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33606.

The product of its digits is 54190080, while the sum is 67.

The square root of 7878898651 is about 88763.1604383260. The cubic root of 7878898651 is about 1989.8568662992.

The spelling of 7878898651 in words is "seven billion, eight hundred seventy-eight million, eight hundred ninety-eight thousand, six hundred fifty-one".