9778997734 has 16 divisors (see below), whose sum is σ = 16003570176. Its totient is φ = 4444561800.

The previous prime is 9778997687. The next prime is 9778997743. The reversal of 9778997734 is 4377998779.

It is a congruent number.

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, 340099 + ... + 367729.

It is an arithmetic number, because the mean of its divisors is an integer number (1000223136).

Almost surely, 2^9778997734 is an apocalyptic number.

9778997734 is a deficient number, since it is larger than the sum of its proper divisors (6224572442).

9778997734 is a wasteful number, since it uses less digits than its factorization.

9778997734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43731.

The product of its digits is 168031584, while the sum is 70.

The square root of 9778997734 is about 98888.8150095854. The cubic root of 9778997734 is about 2138.4451492866.

The spelling of 9778997734 in words is "nine billion, seven hundred seventy-eight million, nine hundred ninety-seven thousand, seven hundred thirty-four".