7879898751 has 4 divisors (see below), whose sum is σ = 10506531672. Its totient is φ = 5253265832.

The previous prime is 7879898749. The next prime is 7879898759. The reversal of 7879898751 is 1578989787.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1578989787 = 3 ⋅526329929.

It is a cyclic number.

It is not a de Polignac number, because 7879898751 - 2¹ = 7879898749 is a prime.

It is a super-2 number, since 2×7879898751² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7879898759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313316456 + ... + 1313316461.

It is an arithmetic number, because the mean of its divisors is an integer number (2626632918).

Almost surely, 2^7879898751 is an apocalyptic number.

7879898751 is a deficient number, since it is larger than the sum of its proper divisors (2626632921).

7879898751 is a wasteful number, since it uses less digits than its factorization.

7879898751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2626632920.

The product of its digits is 71124480, while the sum is 69.

The square root of 7879898751 is about 88768.7937903856. The cubic root of 7879898751 is about 1989.9410562240.

The spelling of 7879898751 in words is "seven billion, eight hundred seventy-nine million, eight hundred ninety-eight thousand, seven hundred fifty-one".